1. Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York.
2. Department of Surgery, David Grant United States Air Force Medical Center, Fairfield, California.
3. Department of Surgery, University of California-San Francisco Medical Center, San Francisco, California.
4. Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York.
5. Department of Surgery, Warren Alpert Medical School, Brown University, Rhode Island Hospital, Providence, Rhode Island.
6. Division of Gastroenterology, Memorial Sloan-Kettering Cancer Center, New York, New York.