1. Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear Infirmary and Harvard Medical School, Boston (Drs Lindsay and Hadlock and Mssrs Edwards and Smitson), Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston (Dr Heaton); and Department of Otolaryngology–Head and Neck Surgery, National Naval Medical Center, Bethesda, Maryland (Dr Lindsay).