1 Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA; Department of Dermatology, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.
2 Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA.
3 Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA. Electronic address: marchetm@mskcc.org.