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There is little current research on the transition to natural menopause among contemporary groups of mid-life women at age 40 years. This study reports on female members of the Christchurch Health and Development Study cohort. This research aimed to: document the menopause status, reproductive outcomes and climacteric symptoms of the women at age 40 years; examine the associations between menopause status and concurrent measures of psychosocial and economic well-being; and document the associations between menopause status and potential predictors of menopause reflecting childhood, family and individual factors prior to age 40 years. The Christchurch Health and Development Study is a longitudinal, representative, prospective cohort of 1265 babies (630 females) born in New Zealand in 1977. At age 40 years, 470 women (who had not experienced surgical menopause) were interviewed on their menopause status, climacteric symptoms and associated factors. The majority of women were premenopausal, around 20% were perimenopausal and 2% were postmenopausal. Statistically significant associations were found reflecting higher rates of diagnosed reproductive disorder, climacteric symptoms, low occupational status, non-heterosexual sexuality and exposure to childhood sexual abuse amongst both perimenopausal and postmenopausal women at age 40 years. These data will inform directions for future data collection and analyses.

Genome-wide association studies have discovered hundreds of loci associated with complex brain disorders, but it remains unclear in which cell types these loci are active. Here we integrate genome-wide association study results with single-cell transcriptomic data from the entire mouse nervous system to systematically identify cell types underlying brain complex traits. We show that psychiatric disorders are predominantly associated with projecting excitatory and inhibitory neurons. Neurological diseases were associated with different cell types, which is consistent with other lines of evidence. Notably, Parkinson’s disease was genetically associated not only with cholinergic and monoaminergic neurons (which include dopaminergic neurons) but also with enteric neurons and oligodendrocytes. Using post-mortem brain transcriptomic data, we confirmed alterations in these cells, even at the earliest stages of disease progression. Our study provides an important framework for understanding the cellular basis of complex brain maladies, and reveals an unexpected role of oligodendrocytes in Parkinson’s disease. © 2020, The Author(s), under exclusive licence to Springer Nature America, Inc.

Genome-wide association studies have discovered hundreds of loci associated with complex brain disorders, but it remains unclear in which cell types these loci are active. Here we integrate genome-wide association study results with single-cell transcriptomic data from the entire mouse nervous system to systematically identify cell types underlying brain complex traits. We show that psychiatric disorders are predominantly associated with projecting excitatory and inhibitory neurons. Neurological diseases were associated with different cell types, which is consistent with other lines of evidence. Notably, Parkinson’s disease was genetically associated not only with cholinergic and monoaminergic neurons (which include dopaminergic neurons) but also with enteric neurons and oligodendrocytes. Using post-mortem brain transcriptomic data, we confirmed alterations in these cells, even at the earliest stages of disease progression. Our study provides an important framework for understanding the cellular basis of complex brain maladies, and reveals an unexpected role of oligodendrocytes in Parkinson’s disease. Eating Disorders Working Group of the Psychiatric Genomics Consortium Roger Adan17,18,19, Lars Alfredsson20, Tetsuya Ando21, Ole Andreassen22, Jessica Baker9, Andrew Bergen23,24, Wade Berrettini25, Andreas Birgegård26,27, Joseph Boden28, Ilka Boehm29, Claudette Boni30, Vesna Boraska Perica31,32, Harry Brandt33, Gerome Breen13,14, Julien Bryois1, Katharina Buehren34, Cynthia Bulik1,9,15, Roland Burghardt35, Matteo Cassina36, Sven Cichon37, Maurizio Clementi36, Jonathan Coleman13,14, Roger Cone38, Philippe Courtet39, Steven Crawford33, Scott Crow40, James Crowley16,26, unna Danner18, Oliver Davis41,42, Martina de Zwaan43, George Dedoussis44, Daniela Degortes45, Janiece DeSocio46, Danielle Dick47, Dimitris Dikeos48, Christian Dina49,50, Monika Dmitrzak-Weglarz51, Elisa Docampo Martinez52,53,54, Laramie Duncan55, Karin Egberts56, Stefan Ehrlich29, Geòrgia Escaramís52,53,54, Tõnu Esko57,58, Xavier Estivill52,53,54,59, Anne Farmer13, Angela Favaro45, Fernando Fernández-Aranda60,61, Manfred Fichter62,63, Krista Fischer57, Manuel Föcker64, Lenka Foretova65, Andreas Forstner37,66,67,68,69, Monica Forzan36, Christopher Franklin31, Steven Gallinger70, Héléna Gaspar13,14, Ina Giegling71, Johanna Giuranna64, Paola Giusti-Rodríquez16, Fragiskos Gonidakis72, Scott Gordon73, Philip Gorwood30,74, Monica Gratacos Mayora52,53,54, Jakob Grove75,76,77,78, Sébastien Guillaume39, Yiran Guo79, Hakon Hakonarson79,80, Katherine Halmi81, Ken Hanscombe82, Konstantinos Hatzikotoulas31, Joanna Hauser83, Johannes Hebebrand64, Sietske Helder13,84, Anjali Henders85, Stefan Herms37,69, Beate Herpertz-Dahlmann34, Wolfgang Herzog86, Anke Hinney64, L. John Horwood28, Christopher Hübel1,13, Laura Huckins31,87, James Hudson88, Hartmut Imgart89, Hidetoshi Inoko90, Vladimir Janout91, Susana Jiménez-Murcia60,61, Craig Johnson92, Jennifer Jordan93,94, Antonio Julià95, Anders Juréus1, Gursharan Kalsi13, Deborah Kaminská96, Allan Kaplan97, Jaakko Kaprio98,99, Leila Karhunen100, Andreas Karwautz101, Martien Kas17,102, Walter Kaye103, James Kennedy97, Martin Kennedy104, Anna Keski-Rahkonen98, Kirsty Kiezebrink105, Youl-Ri Kim106, Katherine Kirk73, Lars Klareskog107, Kelly Klump108, Gun Peggy Knudsen109, Maria La Via9, Mikael Landén1,19, Janne Larsen76,110,111, Stephanie Le Hellard112,113,114, Virpi Leppä1, Robert Levitan115, Dong Li79, Paul Lichtenstein1, Lisa Lilenfeld116, Bochao Danae Lin17, Jolanta Lissowska117, Jurjen Luykx17, Pierre Magistretti118,119, Mario Maj120, Katrin Mannik57,121, Sara Marsal95, Christian Marshall122, Nicholas Martin73, Manuel Mattheisen26,27,75,123, Morten Mattingsdal22, Sara McDevitt124,125, Peter McGuffin13, Sarah Medland73, Andres Metspalu57,126, Ingrid Meulenbelt127, Nadia Micali128,129, James Mitchell130, Karen Mitchell131, Palmiero Monteleone132, Alessio Maria Monteleone120, Grant Montgomery73,85,133, Preben Bo Mortensen76,110,111, Melissa Munn-Chernoff9, Benedetta Nacmias134, Marie Navratilova65, Claes Norring26,27, Ioanna Ntalla44, Catherine Olsen73, Roel Ophoff17,135, Julie O’Toole136, Leonid Padyukov107, Aarno Palotie58,99,137, Jacques Pantel30, Hana Papezova96, Richard Parker73, John Pearson138, Nancy Pedersen1, Liselotte Petersen76,110,111, Dalila Pinto87, Kirstin Purves13, Raquel Rabionet139,140,141, Anu Raevuori98, Nicolas Ramoz30, Ted Reichborn-Kjennerud109,142, Valdo Ricca134,143, Samuli Ripatti144, Stephan Ripke145,146,147, Franziska Ritschel29,148, Marion Roberts13, Alessandro Rotondo149, Dan Rujescu62,71, Filip Rybakowski150, Paolo Santonastaso151, André Scherag152, Stephen Scherer153, ulrike Schmidt13, Nicholas Schork154, Alexandra Schosser155, Jochen Seitz34, Lenka Slachtova156, P. Eline Slagboom127, Margarita Slof-Op ‘t Landt157,158, Agnieszka Slopien159, Sandro Sorbi134,160, Michael Strober161,162, Garret Stuber9,163, Patrick Sullivan1,16, Beata Świątkowska164, Jin Szatkiewicz16, Ioanna Tachmazidou31, Elena Tenconi45, Laura Thornton9, Alfonso Tortorella165,166, Federica Tozzi167, Janet Treasure13, Artemis Tsitsika168, Marta Tyszkiewicz-Nwafor150, Konstantinos Tziouvas169, Annemarie van Elburg18,170, Eric van Furth157,158, Tracey Wade171, Gudrun Wagner101, Esther Walton29, Hunna Watson9,10,11, Thomas Werge172, David Whiteman73, Elisabeth Widen99, D. Blake Woodside173,174, Shuyang Yao1, Zeynep Yilmaz9,16, Eleftheria Zeggini31,175, Stephanie Zerwas9 and Stephan Zipfel176 17Brain Center Rudolf Magnus, Department of Translational Neuroscience, University Medical Center Utrecht, Utrecht, the Netherlands. 18Center for Eating Disorders Rintveld, Altrecht Mental Health Institute, Zeist, the Netherlands. 19Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. 20Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden. 21Department of Behavioral Medicine, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan. 22NORMENT KG Jebsen Centre, Division of Mental Health and Addiction, University of Oslo, Oslo University Hospital, Oslo, Norway. 23BioRealm, LLC, Walnut, CA, USA. 24Oregon Research Institute, Eugene, OR, USA. 25Department of Psychiatry, Center for Neurobiology and Behavior, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA. 26Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden. 27Center for Psychiatry Research, Stockholm Health Care Services, Stockholm City Council, Stockholm, Sweden. 28Christchurch Health and Development Study, University of Otago, Christchurch, New Zealand. 29Division of Psychological and Social Medicine and Developmental Neurosciences, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany. 30INSERM U894, Centre of Psychiatry and Neuroscience, Paris, France. 31Wellcome Sanger Institute, Hinxton, Cambridge, UK. 32Department of Medical Biology, School of Medicine, University of Split, Split, Croatia. 33The Center for Eating Disorders at Sheppard Pratt, Baltimore, MD, USA. 34Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, RWTH Aachen University, Aachen, Germany. 35Klinikum Frankfurt/Oder, Frankfurt, Germany. 36Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Padua, Italy. 37Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland. 38Life Sciences Institute and Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA. 39Department of Emergency Psychiatry and Post-Acute Care, CHRU Montpellier, University of Montpellier, Montpellier, France. 40Department of Psychiatry, University of Minnesota, Minneapolis, MN, USA. 41MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK. 42School of Social and Community Medicine, University of Bristol, Bristol, UK. 43Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany. 44Department of Nutrition and Dietetics, Harokopio University, Athens, Greece. 45Department of Neurosciences, University of Padova, Padua, Italy. 46College of Nursing, Seattle University, Seattle, WA, USA. 47Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA. 48Department of Psychiatry, Athens University Medical School, Athens University, Athens, Greece. 49L’institut du thorax, INSERM, CNRS, UNIV Nantes, Nantes, France. 50L’institut du thorax, CHU Nantes, Nantes, France. 51Department of Psychiatric Genetics, Poznań University of Medical Sciences, Poznań, Poland. 52Barcelona Institute of Science and Technology, Barcelona, Spain. 53Universitat Pompeu Fabra, Barcelona, Spain. 54Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain. 55Department of Psychiatry and Behavioral Sciences, Stanford University Stanford, CA, USA. 56Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Centre for Mental Health, Würzburg, Germany. 57Estonian Genome Center, University of Tartu, Tartu, Estonia. 58Program in Medical and Population Genetics, Broad Institute of the Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA. 59Genomics and Disease, Bioinformatics and Genomics Programme, Centre for Genomic Regulation, Barcelona, Spain. 60Department of Psychiatry, University Hospital of Bellvitge –IDIBELL and CIBERobn, Barcelona, Spain. 61Department of Clinical Sciences, School of Medicine, University of Barcelona, Barcelona, Spain. 62Department of Psychiatry and Psychotherapy, Ludwig-Maximilians-University (LMU), Munich, Germany. 63Schön Klinik Roseneck affiliated with the Medical Faculty of the University of Munich (LMU), Munich, Germany. 64Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-Essen, Essen, Germany. 65Department of Cancer, Epidemiology and Genetics, Masaryk Memorial Cancer Institute, Brno, Czech Republic. 66Institute of Human Genetics, University of Bonn School of Medicine & University Hospital Bonn, Bonn, Germany. 67Department of Genomics, Life and Brain Center, University of Bonn, Bonn, Germany. 68Department of Psychiatry (UPK), University of Basel, Basel, Switzerland. 69Department of Biomedicine, University of Basel, Basel, Switzerland. 70Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. 71Department of Psychiatry, Psychotherapy and Psychosomatics, Martin Luther University of Halle-Wittenberg, Halle, Germany. 721st Psychiatric Department, National and Kapodistrian University of Athens, Medical School, Eginition Hospital, Athens, Greece. 73QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia. 74CMME (Groupe Hospitalier Sainte-Anne), Paris Descartes University, Paris, France. 75Department of Biomedicine, Aarhus University, Aarhus, Denmark. 76The Lundbeck Foundation Initiative for Integrative Psychiatric Research (iPSyCH), Aarhus, Denmark. 77Centre for Integrative Sequencing, iSEQ, Aarhus University, Aarhus, Denmark. 78Bioinformatics Research Centre, Aarhus University, Aarhus, Denmark. 79Center for Applied Genomics, Children’s Hospital of Philadelphia, Philadelphia, PA, USA. 80Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. 81Department of Psychiatry, Weill Cornell Medical College, New york, Ny, USA. 82Department of Medical and Molecular Genetics, King’s College London, Guy’s Hospital, London, UK. 83Department of Adult Psychiatry, Poznań University of Medical Sciences, Poznań, Poland. 84Zorg op Orde, Leidschendam, the Netherlands. 85Institute for Molecular Bioscience, University of Queensland, Brisbane, Queensland, Australia. 86Department of General Internal Medicine and Psychosomatics, Heidelberg University Hospital, Heidelberg University, Heidelberg, Germany. 87Department of Psychiatry, and Genetics and Genomics Sciences, Division of Psychiatric Genomics, Icahn School of Medicine at Mount Sinai, New york, Ny, USA. 88Biological Psychiatry Laboratory, McLean Hospital/Harvard Medical School, Boston, MA, USA. 89Eating Disorders Unit, Parklandklinik, Bad Wildungen, Germany. 90Department of Molecular Life Science, Division of Basic Medical Science and Molecular Medicine, School of Medicine, Tokai University, Isehara, Japan. 91Faculty of Health Sciences, Palacky University, Olomouc, Czech Republic. 92Eating Recovery Center, Denver, CO, USA. 93Department of Psychological Medicine, University of Otago, Christchurch, New Zealand. 94Canterbury District Health Board, Christchurch, New Zealand. 95Rheumatology Research Group, Vall d’Hebron Research Institute, Barcelona, Spain. 96Department of Psychiatry, First Faculty of Medicine, Charles University, Prague, Czech Republic. 97Center for Addiction and Mental Health, Department of Psychiatry, Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada. 98Department of Public Health, University of Helsinki, Helsinki, Finland. 99Institute for Molecular Medicine Finland, Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland. 100Institute of Public Health and Clinical Nutrition, Department of Clinical Nutrition, University of Eastern Finland, Kuopio, Finland. 101Eating Disorders Unit, Department of Child and Adolescent Psychiatry, Medical University of Vienna, Vienna, Austria. 102Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, the Netherlands. 103Department of Psychiatry, University of California San Diego, San Diego, CA, USA. 104Department of Pathology and Biomedical Science, University of Otago, Christchurch, New Zealand. 105Health Services Research Unit, University of Aberdeen, Aberdeen, UK. 106Department of Psychiatry, Seoul Paik Hospital, Inje University, Seoul, Korea. 107Rheumatology Unit, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden. 108Department of Psychology, Michigan State University, East Lansing, MI, USA. 109Department of Mental Disorders, Norwegian Institute of Public Health, Oslo, Norway. 110National Centre for Register-Based Research, Aarhus BSS, Aarhus University, Aarhus, Denmark. 111Centre for Integrated Register-based Research (CIRRAU), Aarhus University, Aarhus, Denmark. 112Department of Clinical Science, K.G. Jebsen Centre for Psychosis Research, Norwegian Centre for Mental Disorders Research (NORMENT), University of Bergen, Bergen, Norway. 113Dr. Einar Martens Research Group for Biological Psychiatry, Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway. 114Department of Clinical Medicine, Laboratory Building, Haukeland University Hospital, Bergen, Norway. 115Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada. 116American School of Professional Psychology, Argosy University, Northern Virginia, Arlington, VA, USA. 117Department of Cancer Epidemiology and Prevention, M Skłodowska-Curie Cancer Center - Oncology Center, Warsaw, Poland. 118BESE Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia. 119Department of Psychiatry, University of Lausanne-University Hospital of Lausanne (UNIL-CHUV), Lausanne, Switzerland. 120Department of Psychiatry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy. 121Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland. 122Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada. 123Department of Psychiatry, Psychosomatics and Psychotherapy, University of Würzburg, Würzburg, Germany. 124Department of Psychiatry, University College Cork, Cork, Ireland. 125Eist Linn Adolescent Unit, Bessborough, Health Service Executive South, Cork, Ireland. 126Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia. 127Molecular Epidemiology Section (Department of Medical Statistics), Leiden University Medical Centre, Leiden, the Netherlands. 128Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland. 129Division of Child and Adolescent Psychiatry, Geneva University Hospital, Geneva, Switzerland. 130Department of Psychiatry and Behavioral Science, University of North Dakota School of Medicine and Health Sciences, Fargo, ND, USA. 131National Center for PTSD, VA Boston Healthcare System, Department of Psychiatry, Boston University School of Medicine, Boston, MA, USA. 132Department of Medicine, Surgery and Dentistry ‘Scuola Medica Salernitana’, University of Salerno, Salerno, Italy. 133Queensland Brain Institute, University of Queensland, Brisbane, Queensland, Australia. 134Department of Neuroscience, Psychology, Drug Research and Child Health (NEUROFARBA), University of Florence, Florence, Italy. 135Center for Neurobehavioral Genetics, Semel Institute for Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA, USA. 136Kartini Clinic, Portland, OR, USA. 137Center for Human Genome Research at the Massachusetts General Hospital, Boston, MA, USA. 138Biostatistics and Computational Biology Unit, University of Otago, Christchurch, New Zealand. 139Saint Joan de Déu Research Institute, Saint Joan de Déu Barcelona Children’s Hospital, Barcelona, Spain. 140Institute of Biomedicine (IBUB), University of Barcelona, Barcelona, Spain. 141Department of Genetics, Microbiology and Statistics, University of Barcelona, Barcelona, Spain. 142Institute of Clinical Medicine, University of Oslo, Oslo, Norway. 143Department of Health Science, University of Florence, Florence, Italy. 144Department of Biometry, University of Helsinki, Helsinki, Finland. 145Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA, USA. 146Stanley Center for Psychiatric Research, Broad Institute of the Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA. 147Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin, Berlin, Germany. 148Eating Disorders Research and Treatment Center, Department of Child and Adolescent Psychiatry, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany. 149Department of Psychiatry, Neurobiology, Pharmacology, and Biotechnologies, University of Pisa, Pisa, Italy. 150Department of Psychiatry, Poznań University of Medical Sciences, Poznań, Poland. 151Department of Neurosciences, Padua Neuroscience Center, University of Padova, Padua, Italy. 152Institute of Medical Statistics, Computer and Data Sciences, Jena University Hospital, Jena, Germany. 153Department of Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada. 154J. Craig Venter Institute (JCVI), La Jolla, CA, USA. 155Department of Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria. 156Department of Pediatrics and Center of Applied Genomics, First Faculty of Medicine, Charles University, Prague, Czech Republic. 157Center for Eating Disorders Ursula, Rivierduinen, Leiden, the Netherlands. 158Department of Psychiatry, Leiden University Medical Centre, Leiden, the Netherlands. 159Department of Child and Adolescent Psychiatry, Poznań University of Medical Sciences, Poznań, Poland. 160IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy. 161Department of Psychiatry and Biobehavioral Science, Semel Institute for Neuroscience and Human Behavior, University of California Los Angeles, Los Angeles, CA, USA. 162David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA. 163Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. 164Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland. 165Department of Psychiatry, University of Naples SUN, Naples, Italy. 166Department of Psychiatry, University of Perugia, Perugia, Italy. 167Brain Sciences Department, Stremble Ventures, Limassol, Cyprus. 168Adolescent Health Unit, Second Department of Pediatrics, ‘P. & A. Kyriakou’ Children’s Hospital, University of Athens, Athens, Greece. 169Pediatric Intensive Care Unit, ‘P. & A. Kyriakou’ Children’s Hospital, University of Athens, Athens, Greece. 170Faculty of Social and Behavioral Sciences, Utrecht University, Utrecht, the Netherlands. 171School of Psychology, Flinders University, Adelaide, South Australia, Australia. 172Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark. 173Department of Psychiatry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. 174Toronto General Hospital, Toronto, Ontario, Canada. 175Institute of Translational Genomics, Helmholtz Zentrum München, Neuherberg, Germany. 176Department of Internal Medicine VI, Psychosomatic Medicine and Psychotherapy, University Medical Hospital Tübingen, Tübingen, Germany International Headache Genetics Consortium Verneri Anttila177, Ville Artto178, Andrea Carmine Belin179, Irene de Boer180, Dorret I. Boomsma181, Sigrid Børte182, Daniel I. Chasman183, Lynn Cherkas184, Anne Francke Christensen185, Bru Cormand186, Ester Cuenca-Leon177, George Davey-Smith187, Martin Dichgans188, Cornelia van Duijn189, Tonu Esko57, Ann Louise Esserlind190, Michel Ferrari180, Rune R. Frants180, Tobias Freilinger191, Nick Furlotte192, Padhraig Gormley177, Lyn Griffiths193, Eija Hamalainen194, Thomas Folkmann Hansen6, Marjo Hiekkala195, M. Arfan Ikram189, Andres Ingason196, Marjo-Riitta Järvelin197, Risto Kajanne194, Mikko Kallela178, Jaakko Kaprio98,99, Mari Kaunisto195, Lisette J. A. Kogelman6, Christian Kubisch198, Mitja Kurki177, Tobias Kurth199, Lenore Launer200, Terho Lehtimaki201, Davor Lessel198, Lannie Ligthart181, Nadia Litterman192, Arn van den Maagdenberg180, Alfons Macaya202, Rainer Malik188, Massimo Mangino184, George McMahon187, Bertram Muller-Myhsok203, Benjamin M. Neale177, Carrie Northover192, Dale R. Nyholt193, Jes Olesen190, Aarno Palotie58,99,137, Priit Palta194, Linda Pedersen182, Nancy Pedersen1, Danielle Posthuma181, Patricia Pozo-Rosich204, Alice Pressman205, Olli Raitakari206, Markus Schürks199, Celia Sintas186, Kari Stefansson196, Hreinn Stefansson196, Stacy Steinberg196, David Strachan207, Gisela Terwindt180, Marta Vila-Pueyo202, Maija Wessman195, Bendik S. Winsvold182, Huiying Zhao193 and John Anker Zwart182 177Broad Institute of MIT and Harvard, Cambridge, MA, USA. 178Department of Neurology, Helsinki University Central Hospital, Helsinki, Finland. 179Karolinska Institutet, Stockholm, Sweden. 180Leiden University Medical Centre, Leiden, the Netherlands. 181VU University, Amsterdam, the Netherlands. 182Oslo University Hospital and University of Oslo, Oslo, Norway. 183Harvard Medical School, Cambridge, MA, USA. 184Department of Twin Research and Genetic Epidemiology, King’s College London, London, UK. 185Danish Headache Center, Copenhagen University Hospital, Copenhagen, Denmark. 186University of Barcelona, Barcelona, Spain. 187Medical Research Council (MRC) Integrative Epidemiology Unit, University of Bristol, Bristol, UK. 188Institute for Stroke and Dementia Research, Munich, Germany. 189Erasmus University Medical Centre, Rotterdam, the Netherlands. 190Danish Headache Center, Department of Neurology, Rigshospitalet, Glostrup, Denmark. 191University of Tübingen, Tübingen, Germany. 19223&Me Inc., Mountain View, CA, USA. 193Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia. 194Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland. 195Folkhälsan Institute of Genetics, Helsinki, Finland. 196Decode genetics Inc., Reykjavik, Iceland. 197University of Oulu, Biocenter Oulu, Finland. 198University Medical Center Hamburg-Eppendorf, Hamburg, Germany. 199Harvard Medical School, Boston, MA, USA. 200National Institute on Aging, Bethesda, MD, USA. 201School of Medicine, University of Tampere, Tampere, Finland. 202Vall d’Hebron Research Institute, Barcelona, Spain. 203Max Planck Institute of Psychiatry, Munich, Germany. 204Headache Research Group, Universitat Autònoma de Barcelona, Barcelona, Spain. 205Sutter Health, Sacramento, CA, USA. 206Department of Medicine, University of Turku, Turku, Finland. 207Population Health Research Institute, St George’s University of London, London, UK. 23andMe Research Team Michelle Agee208, Babak Alipanahi208, Adam Auton208, Robert Bell208, Katarzyna Bryc208, Sarah Elson208, Pierre Fontanillas208, Nicholas Furlotte208, Karl Heilbron208, David Hinds208, Karen Huber208, Aaron Kleinman208, Nadia Litterman208, Jennifer McCreight208, Matthew McIntyre208, Joanna Mountain208, Elizabeth Noblin208, Carrie Northover208, Steven Pitts208, J. Sathirapongsasuti208, Olga Sazonova208, Janie Shelton208, Suyash Shringarpure208, Chao Tian208, Joyce Tung208, Vladimir Vacic208 and Catherine Wilson208 20823andMe, Inc., Mountain View, CA, US

Over the past decade, new and emerging technologies in air pollution instrumentation have made it possible to involve students and citizen scientists in air pollution monitoring. Similarly, advances in data communication and transmission have made it increasingly easy to share and graphically display data. Two educational programs, the Global Ozone (GO3) Project and AQTreks, have used these advances to get air pollution monitors into the hands of thousands of students around the world and to automate data sharing. The pilot project for AQTreks, GO3 Treks, is also discussed. These educational projects began in 2009 with the GO3 Project, a stationary ground-level ozone monitoring project. In the GO3 Project, students and teachers at more than 100 schools from around the world installed ozone and weather monitoring stations at their schools with automatic uploading of their data every 15 min, resulting in more than 12 million ozone measurements along with associated weather data. Over the years, new technologies became available for students to expand their measurements from stationary to mobile platforms. Since 2016, the AQTreks educational program has been developed concurrently with the Personal Air Monitor (PAM), a mobile sensor suite paired with a smartphone app. Complementing the technology are online curricula and other resources for students and citizens to learn about air pollution and climate change. In these projects, a focus on data quality and the careful selection of monitoring technologies have resulted in scientific use of the student-collected data, including their incorporation in several research campaigns that have furthered understanding of ground-level ozone formation. This approach has demonstrated the utility of these types of educational programs both in terms of furthering scientific research and educating the next generation about air quality issues. Keywords: Citizen science, Community science, K-12 education, Air pollution, Miniaturized instruments, Sensors, Atmospheric chemistry, Mobile monitoring, Stationary monitoring