1. Department of Otolaryngology and Maxillofacial Surgery, Northwestern University Medical School, Evanston, Ill, Evanston, Illinois
2. Melrose, Massachusetts
3. Division of Otolaryngology, Evanston (Ill) Hospital, Evanston, Illinois
4. Department of Oral Pathology, Tufts University School of Dental Medicine, BostonMassachusetts