1. Department of Dermatology, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
2. Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
3. Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
4. New York Institute of Technology College of Osteopathic Medicine, New York
5. Skin and Cancer Associates, Plantation, Florida
6. Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York