1. Department of Dermatology, New York Medical College, Metropolitan Hospital, New York, NY 10029, USA
2. Department of Dermatology, Escuela de Medicina, Pontificia Universidad Catolica de Chile, Santiago 8331150, Chile
3. Dermatology and Laser Centre, Los Angeles, CA 91604, USA
4. Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
5. Dermatology Service, Department of Medicine, Weill Cornell Medicine, New York, NY 10021, USA