1. Dermatology Service, Memorial Sloan Kettering Cancer Center, New York, New York
2. Department of Dermatology, University of Athens, A. Sygros Hospital, Athens, Greece
3. Department of Dermatology, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
4. Department of Dermatology, SUNY Downstate Medical Center, New York, New York
5. Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York