1. Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York2Dermatology Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
2. Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
3. Pathology Department, Memorial Sloan Kettering Cancer Center, New York, New York