1. Human Oncology and Pathogenesis Program, Memorial Sloan-Kettering Cancer Center, New York, New York.
2. Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York.
3. Department of Pathology, Memorial Sloan-Kettering Cancer Center, New York, New York.
4. Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York.