1. Department of Dermatology; Brown University, Warren Alpert Medical School; Providence RI
2. Department of Epidemiology, School of Public Health; Brown University; Providence RI
3. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital; Harvard Medical School; Boston MA
4. Department of Epidemiology, Richard M. Fairbanks School of Public Health; Indiana University; Indianapolis IN
5. Melvin and Bren Simon Cancer Center, Indiana University; Indianapolis IN
6. Center for Dermatoepidemiology, VA Medical Center; Providence RI
7. Department of Dermatology; Rhode Island Hospital; Providence RI