1. Harvard Medical School, Boston, Massachusetts, USA.
2. Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA.
3. Institute for Technology Assessment, Massachusetts General Hospital, Boston, Massachusetts, USA.
4. Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, USA.
5. Section of Endocrine Surgery, Division of Surgical Oncology, Department of Surgery, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.