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Adlard, J., Barwell, J., Ong, K.-R., Snape, K., Walker, L., Izatt, L., Side, L., Tischkowitz, M., Rogers, M.T., Porteous, M.E., Ahmed, M., Morrison, P.J., Brennan, P., Eeles, R., Davidson, R., Collée, M., Cornelissen, S., Couch, F.J., Cox, A., Cross, S.S., Cybulski, C., Czene, K., Daly, M.B., de la Hoya, M., Devilee, P., Diez, O., Ding, Y.C., Dite, G.S., Domchek, S.M., Dörk, T., dos-Santos-Silva, I., Droit, A., Dubois, S., Dumont, M., Duran, M., Durcan, L., Dwek, M., Eccles, D.M., Engel, C., Eriksson, M., Evans, D.G., Fasching, P.A., Fletcher, O., Floris, G., Flyger, H., Foretova, L., Foulkes, W.D., Friedman, E., Fritschi, L., Frost, D., Gabrielson, M., Gago-Dominguez, M., Gambino, G., Ganz, P.A., Gapstur, S.M., Garber, J., García-Sáenz, J.A., Gaudet, M.M., Georgoulias, V., Giles, G., Glendon, G., Godwin, A.K., Goldberg, M.S., Goldgar, D.E., González-Neira, A., Tibiletti, M.G., Greene, M.H., Grip, M., Gronwald, J., Grundy, A., Guénel, P., Hahnen, E., Haiman, C.A., Håkansson, N., Hall, P., Hamann, U., Harrington, P.A., Hartikainen, J.M., Hartman, M., He, W., Healey, C.S., Heemskerk-Gerritsen, B.A.M., Heyworth, J., Hillemanns, P., Hogervorst, F.B.L., Hollestelle, A., Hooning, M., Hopper, J., Howell, A., Huang, G., Hulick, P.J., Imyanitov, E.N., Sexton, A., Christian, A., Trainer, A., Spigelman, A., Fellows, A., Shelling, A., Fazio, A.D., Blackburn, A., Crook, A., Meiser, B., Patterson, B., Clarke, C., Saunders, C., Hunt, C., Scott, C., Amor, D., Marsh, D., Edkins, E., Salisbury, E., Haan, E., Neidermayr, E., Macrea, F., Farshid, G., Lindeman, G., Chenevix-Trench, G., Mann, G., Gill, G., Thorne, H., Hickie, I., Winship, I., Flanagan, J., Kollias, J., Visvader, J., Stone, J., Taylor, J., Burke, J., Saunus, J., Forbes, J., Kirk, J., French, J., Tucker, K., Wu, K., Phillips, K., Lipton, L., Andrews, L., Lobb, L., Kentwell, M., Spurdle, M., Cummings, M., Gleeson, M., Harris, M., Jenkins, M., Young, M.A., Delatycki, M., Wallis, M., Burgess, M., Price, M., Brown, M., Southey, M., Bogwitz, M., Field, M., Friedlander, M., Gattas, M., Saleh, M., Hayward, N., Pachter, N., Cohen, P., Duijf, P., James, P., Simpson, P., Fong, P., Butow, P., Williams, R., Kefford, R., Scott, R., Milne, R.L., Balleine, R., Dawson, S.–J., Lok, S., O’Connell, S., Greening, S., Nightingale, S., Edwards, S., Fox, S., McLachlan, S.-A., Lakhani, S., Antill, Y., Aalfs, C., Meijers-Heijboer, H., van Engelen, K., Gille, H., Boere, I., van Deurzen, C., Obdeijn, I.-M., van den Ouweland, A., Seynaeve, C., Siesling, S., Verloop, J., van Asperen, C.J., van Cronenburg, T., Blok, R., de Boer, M., Garcia, E.G., Adank, M., Hogervorst, F., Jenner, D., van Leeuwen, F., Rookus, M., Russell, N., Schmidt, M., van den Belt-Dusebout, S., Kets, C., Mensenkamp, A., de Bock, T., van der Hout, A., Mourits, M., Oosterwijk, J., Ausems, M., Koudijs, M., Baxter, R., Yip, D., Carpenter, J., Davis, A., Pathmanathan, N., Graham, D., Sachchithananthan, M., Isaacs, C., Iwasaki, M., Jager, A., Jakimovska, M., Jakubowska, A., James, P.A., Janavicius, R., Jankowitz, R.C., John, E.M., Johnson, N., Jones, M.E., Jukkola-Vuorinen, A., Jung, A., Kaaks, R., Kang, D., Kapoor, P.M., Karlan, B.Y., Keeman, R., Kerin, M.J., Khusnutdinova, E., Kiiski, J.I., Kitahara, C.M., Ko, Y.-D., Konstantopoulou, I., Kosma, V.-M., Koutros, S., Kubelka-Sabit, K., Kwong, A., Kyriacou, K., Laitman, Y., Lambrechts, D., Lee, E., Leslie, G., Lester, J., Lesueur, F., Lindblom, A., Lo, W.-Y., Long, J., Lophatananon, A., Loud, J.T., Lubiński, J., MacInnis, R.J., Maishman, T., Makalic, E., Mannermaa, A., Manoochehri, M., Manoukian, S., Margolin, S., Martinez, M.E., Matsuo, K., Maurer, T., Mavroudis, D., Mayes, R., McGuffog, L., McLean, C., Meindl, A., Miller, A., Miller, N., Montagna, M., Moreno, F., Muir, K., Mulligan, A.M., Muñoz-Garzon, V.M., Muranen, T.A., Narod, S.A., Nassir, R., Nathanson, K.L., Neuhausen, S.L., Nevanlinna, H., Neven, P., Nielsen, F.C., Nikitina-Zake, L., Norman, A., Offit, K., Olah, E., Olopade, O.I., Olsson, H., Orr, N., Osorio, A., Pankratz, V.S., Papp, J., Park, S.K., Park-Simon, T.-W., Parsons, M.T., Paul, J., Pedersen, I.S., Peissel, B., Peshkin, B., Peterlongo, P., Peto, J., Plaseska-Karanfilska, D., Prajzendanc, K., Prentice, R., Presneau, N., Prokofyeva, D., Pujana, M.A., Pylkäs, K., Radice, P., Ramus, S.J., Rantala, J., Rau-Murthy, R., Rennert, G., Risch, H.A., Robson, M., Romero, A., Rossing, M., Saloustros, E., Sánchez-Herrero, E., Sandler, D.P., Santamariña, M., Sawyer, E.J., Scheuner, M.T., Schmidt, D.F., Schmutzler, R.K., Schneeweiss, A., Schoemaker, M.J., Schöttker, B., Schürmann, P., Scott, R.J., Senter, L., Seynaeve, C.M., Shah, M., Sharma, P., Shen, C.-Y., Shu, X.-O., Singer, C.F., Slavin, T.P., Smichkoska, S., Southey, M.C., Spinelli, J.J., Spurdle, A.B., Sutter, C., Swerdlow, A.J., Tamimi, R.M., Tan, Y.Y., Tapper, W.J., Taylor, J.A., Teixeira, M.R., Tengström, M., Teo, S.H., Terry, M.B., Teulé, A., Thomassen, M., Thull, D.L., Toland, A.E., Tollenaar, R.A.E.M., Tomlinson, I., Torres, D., Torres-Mejía, G., Troester, M.A., Truong, T., Tung, N., Tzardi, M., Ulmer, H.-U., Vachon, C.M., van der Kolk, L.E., van Rensburg, E.J., Vega, A., Viel, A., Vijai, J., Vogel, M.J., Wang, Q., Wappenschmidt, B., Weinberg, C.R., Weitzel, J.N., Wendt, C., Wildiers, H., Winqvist, R., Wolk, A., Wu, A.H., Yannoukakos, D., Zhang, Y., Zheng, W., Hunter, D., Pharoah, P.D.P., Chang-Claude, J., García-Closas, M., Schmidt, M.K., Kristensen, V.N., French, J.D., Edwards, S.L., Antoniou, A.C., Simard, J., Easton, D.F., Kraft, P., Dunning, A.M., Collaborators, GEMO Study, Collaborators, EMBRACE, Investigators, KConFab, Investigators, HEBON, Investigators, ABCTB, Fachal, Laura, Aschard, Hugues, Beesley, Jonathan, Barnes, Daniel R, Duijf, Pascal, Dunning, Alison M, GEMO Study Collaborators, EMBRACE Collaborators, KConFab Investigators, HEBON Investigators, ABCTB Investigators, MUMC+: MA Medische Oncologie (9), RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, Klinische Genetica, MUMC+: DA KG Polikliniek (9), RS: GROW - R4 - Reproductive and Perinatal Medicine, MUMC+: DA KG Lab Centraal Lab (9), European Commission, Government of Canada, Canadian Institutes of Health Research, National Institutes of Health (US), Cancer Research UK, Département de Biologie Computationnelle - Department of Computational Biology, Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS), QIMR Berghofer Medical Research Institute, University of Cambridge [UK] (CAM), NSCAD, University of Cyprus [Nicosia], Harvard T.H. Chan School of Public Health, This work was supported by the European Union’s Horizon 2020 Research and Innovation Programme under Marie Sklodowska-Curie grant agreement number 656144. Genotyping of the OncoArray was principally funded from three sources: the PERSPECTIVE project (funded by the Government of Canada through Genome Canada and the Canadian Institutes of Health Research, the ‘Ministère de l’Économie de la Science et de l’Innovation du Québec’ (through Genome Québec) and the Quebec Breast Cancer Foundation), the NCI Genetic Associations and Mechanisms in Oncology (GAME-ON) initiative and the Discovery, Biology and Risk of Inherited Variants in Breast Cancer (DRIVE) project (NIH grants U19 CA148065 and X01HG007492), and Cancer Research UK (C1287/A10118, C8197/A16565 and C1287/A16563). BCAC is funded by Cancer Research UK (C1287/A16563), by the European Community’s Seventh Framework Programme under grant agreement 223175 (HEALTH-F2-2009-223175) (COGS) and by the European Union’s Horizon 2020 Research and Innovation Programme under grant agreements 633784 (B-CAST) and 634935 (BRIDGES). Genotyping of the iCOGS array was funded by the European Union (HEALTH-F2-2009-223175), Cancer Research UK (C1287/A10710), the Canadian Institutes of Health Research for the ‘CIHR Team in Familial Risks of Breast Cancer’ program, and the Ministry of Economic Development, Innovation and Export Trade of Quebec (grant PSR-SIIRI-701). Combining of the GWAS data was supported in part by NIH Cancer Post-Cancer GWAS initiative grant U19 CA 148065 (DRIVE, part of the GAME-ON initiative). For a full description of funding and acknowledgments, see the Supplementary Note., We thank all of the individuals who took part in these studies, as well as all of the researchers, clinicians, technicians and administrative staff who enabled this work to be carried out, European Project: 656144,H2020,H2020-MSCA-IF-2014,RADIOGENFF(2016), European Project: 223175,EC:FP7:HEALTH,FP7-HEALTH-2007-B,COGS(2009), European Project: 633784,H2020,H2020-PHC-2014-two-stage,B-CAST(2015), European Project: 634935,H2020,H2020-PHC-2014-two-stage,BRIDGES(2015), Clinical Genetics, Medical Oncology, Pathology, Radiology & Nuclear Medicine, Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS), University of Cyprus [Nicosia] (UCY), Centre de recherche en épidémiologie et santé des populations (CESP), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay, Damage and Repair in Cancer Development and Cancer Treatment (DARE), Life Course Epidemiology (LCE), Targeted Gynaecologic Oncology (TARGON), Basic and Translational Research and Imaging Methodology Development in Groningen (BRIDGE), Aschard, Hugues [0000-0002-7554-6783], Barnes, Daniel R [0000-0002-3781-7570], Dennis, Joe [0000-0003-4591-1214], Michailidou, Kyriaki [0000-0001-7065-1237], Lemaçon, Audrey [0000-0002-1817-7029], Andrulis, Irene L [0000-0002-4226-6435], Arason, Adalgeir [0000-0003-0480-886X], Arndt, Volker [0000-0001-9320-8684], Auber, Bernd [0000-0003-1880-291X], Azzollini, Jacopo [0000-0002-9364-9778], Bojesen, Stig E [0000-0002-4061-4133], Bonanni, Bernardo [0000-0003-3589-2128], Brauch, Hiltrud [0000-0001-7531-2736], Campbell, Ian [0000-0002-7773-4155], Carroll, Jason S [0000-0003-3643-0080], Claes, Kathleen BM [0000-0003-0841-7372], Collée, J Margriet [0000-0002-9272-9346], Devilee, Peter [0000-0002-8023-2009], Dörk, Thilo [0000-0002-9458-0282], Dwek, Miriam [0000-0001-7184-2932], Fletcher, Olivia [0000-0001-9387-7116], Floris, Giuseppe [0000-0003-2391-5425], Foulkes, William D [0000-0001-7427-4651], García-Sáenz, José A [0000-0001-6880-0301], Greene, Mark H [0000-0003-1852-9239], Guénel, Pascal [0000-0002-8359-518X], Heemskerk-Gerritsen, Bernadette AM [0000-0002-9724-6693], Hollestelle, Antoinette [0000-0003-1166-1966], Hulick, Peter J [0000-0001-8397-4078], Jakimovska, Milena [0000-0002-1506-0669], Jakubowska, Anna [0000-0002-5650-0501], James, Paul A [0000-0002-4361-4657], Jones, Michael E [0000-0001-7479-3451], Kapoor, Pooja Middha [0000-0001-5503-8215], Keeman, Renske [0000-0002-5452-9933], Konstantopoulou, Irene [0000-0002-0470-0309], Leslie, Goska [0000-0001-5756-6222], Lesueur, Fabienne [0000-0001-7404-4549], Matsuo, Keitaro [0000-0003-1761-6314], McLean, Catriona [0000-0002-0302-5727], Miller, Austin [0000-0001-9739-8462], Muir, Kenneth [0000-0001-6429-988X], Muranen, Taru A [0000-0002-5895-1808], Nathanson, Katherine L [0000-0002-6740-0901], Nevanlinna, Heli [0000-0002-0916-2976], Olopade, Olufunmilayo I [0000-0002-9936-1599], Orr, Nick [0000-0003-2866-942X], Pankratz, V Shane [0000-0002-3742-040X], Parsons, Michael T [0000-0003-3242-8477], Paul, James [0000-0001-7367-5816], Peshkin, Beth [0000-0002-2997-4701], Peterlongo, Paolo [0000-0001-6951-6855], Peto, Julian [0000-0002-1685-8912], Plaseska-Karanfilska, Dijana [0000-0001-8877-2416], Pylkäs, Katri [0000-0002-2449-0521], Radice, Paolo [0000-0001-6298-4111], Rennert, Gad [0000-0002-8512-068X], Robson, Mark [0000-0002-3109-1692], Romero, Atocha [0000-0002-1634-7397], Saloustros, Emmanouil [0000-0002-0485-0120], Scott, Christopher [0000-0003-1340-0647], Scott, Rodney J [0000-0001-7724-3404], Spurdle, Amanda B [0000-0003-1337-7897], Stone, Jennifer [0000-0001-5077-0124], Sutter, Christian [0000-0003-4051-5888], Tan, Yen Yen [0000-0003-1063-5352], Teixeira, Manuel R [0000-0002-4896-5982], Toland, Amanda E [0000-0002-0271-1792], Tomlinson, Ian [0000-0003-3037-1470], Viel, Alessandra [0000-0003-2804-0840], Vijai, Joseph [0000-0002-7933-151X], Wolk, Alicja [0000-0001-7387-6845], Yannoukakos, Drakoulis [0000-0001-7509-3510], Pharoah, Paul DP [0000-0001-8494-732X], Schmidt, Marjanka K [0000-0002-2228-429X], Milne, Roger L [0000-0001-5764-7268], Edwards, Stacey L [0000-0001-7428-4139], Simard, Jacques [0000-0001-6906-3390], Easton, Douglas F [0000-0003-2444-3247], Kraft, Peter [0000-0002-4472-8103], Dunning, Alison M [0000-0001-6651-7166], Apollo - University of Cambridge Repository, Academic Medical Center, ARD - Amsterdam Reproduction and Development, Human genetics, CCA - Cancer biology and immunology, Molecular cell biology and Immunology, Medicum, Kristiina Aittomäki / Principal Investigator, HUSLAB, Department of Medical and Clinical Genetics, University of Helsinki, HUS Comprehensive Cancer Center, Department of Oncology, Clinicum, Doctoral Programme in Clinical Research, Staff Services, INDIVIDRUG - Individualized Drug Therapy, HUS Gynecology and Obstetrics, and Department of Obstetrics and Gynecology