1. Corporal Michael J. Crescenz Veterans Affairs Medical Center Philadelphia PA U.S.A.
2. Department of Dermatology Perelman School of Medicine University of Pennsylvania Philadelphia PA U.S.A.
3. Department of Dermatology Changi General Hospital Singapore
4. Department of Biostatistics and Epidemiology Perelman School of Medicine University of Pennsylvania Philadelphia PA U.S.A.
5. Department of Dermatology Faculty of Medicine University of Tsukuba Ibaraki Japan
6. Department of Dermatology Kanazawa University Graduate School of Medical Science Kanazawa Japan