1. Departments of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
2. Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA.
3. Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA.
4. Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, USA.
5. Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, USA.