1. Departments of Otolaryngology and General Surgery, Harvard Medical School, Boston, Massachusetts.
2. Department of General Surgery, University of California, San Francisco, California.
3. Department of General Surgery, New York University, New York, New York.
4. Department of Pathology, University of Pennsylvania, Philadelphia, Pennsylvania.
5. Department of Endocrinology, University of Pennsylvania, Philadelphia, Pennsylvania.
6. Department of Otolaryngology, University of Cincinnati, Cincinnati, Ohio.
7. Department of Otolaryngology, John Hopkins Medical Center, Baltimore, Maryland.
8. Department of Endocrinology, Memorial Sloan Kettering Cancer Center, New York, New York.