1. From the Department of Otolaryngology, Delaware County Memorial Hospital, Drexel Hill, Penn.
2. Department of Radiation Oncology, Delaware County Memorial Hospital, Drexel Hill, Penn.
3. Department of Otolaryngology, Drexel University College of Medicine, Philadelphia
4. Department of Otolaryngology, Tomas Jefferson University, Philadelphia
5. Department of Otolaryngology, Main Line Health Hospital System, Philadelphia