1 Department of Dermatology, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
2 Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York.
3 Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York.
4 Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York.
5 Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York. Electronic address: [email protected].