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