1. University of South Carolina School of Medicine; Columbia SC U.S.A.
2. Columbia University College of Physicians and Surgeons; New York NY U.S.A.
3. Georgetown University School of Medicine; Washington DC U.S.A.
4. Dermatoepidemiology Unit; VA Medical Center Providence; Providence RI U.S.A.
5. Department of Dermatology; Rhode Island Hospital; Providence RI U.S.A.
6. Departments of Dermatology and Epidemiology; Brown University; Providence RI U.S.A.
7. Robert Wood Johnson Foundation Clinical Scholars Program; Yale University School of Medicine; New Haven CT U.S.A.
8. Dermatology Service; U.S. Department of Veterans Affairs; Connecticut Health Care System; West Haven CT U.S.A.
9. Department of Dermatology; Kings College Hospital NHS Trust; London U.K
10. Institute for Health Metrics and Evaluation; University of Washington; Seattle WA U.S.A.
11. Dermatology Division; Children's National Medical Center; Washington DC U.S.A.
12. Department of Dermatology; Azienda Ospedaliera papa Giovanni XXIII; Bergamo Italy
13. Department of Dermatology; University of Colorado Anschutz Medical Campus; Aurora CO U.S.A.
14. Dermatology Service; U.S. Department of Veterans Affairs; Eastern Colorado Health Care System; Denver CO 80220 U.S.A.
15. Department of Epidemiology; Colorado School of Public Health; Aurora CO U.S.A.