Department of Dermatology and Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA, Department of Dermatology, Free University Hospital, De Boelelaan 1117, 1081, HV Amsterdam, The Netherlands, Ann Arbor, Raaij, E.M.H., Bruynzeel, I., Nickoloff, Brian J., Stoof, T.J., Willemze, R., Boorsma, D.M., Department of Dermatology and Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA, Department of Dermatology, Free University Hospital, De Boelelaan 1117, 1081, HV Amsterdam, The Netherlands, Ann Arbor, Raaij, E.M.H., Bruynzeel, I., Nickoloff, Brian J., Stoof, T.J., Willemze, R., and Boorsma, D.M.