1. Program for Clinical Research; Department of Dermatology; University of California San Francisco; San Francisco CA U.S.A.
2. Department of Dermatology; Warren Alpert Medical School; Brown University; Providence RI U.S.A.
3. Department of Epidemiology; School of Public Health; Brown University; Providence RI U.S.A.
4. Channing Division of Network Medicine; Department of Medicine; Brigham and Women's Hospital and Harvard Medical School; Boston MA U.S.A.
5. Department of Epidemiology; Richard M. Fairbanks School of Public Health; Indiana University; Indianapolis IN U.S.A.
6. Melvin and Bren Simon Cancer Center; Indiana University; Indianapolis IN U.S.A.