1. Ackerman Academy of Dermatopathology; New York NY USA
2. Department of Pathology; Dartmouth-Hitchcock Medical Center; Lebanon NH USA
3. Department of Dermatology; La Princesa University Hospital; Madrid Spain
4. Department of Pathology; New York University; New York NY USA
5. Department of Dermatopathology; Shandong Provincial Institute of Dermatology and Venereology; Jinan Shandong China
6. Section of Biostatics and Epidemiology; Department of Family and Community Medicine, Geisel School of Medicine; Lebanon NH USA