1. Department of Radiology, Weill Cornell Medicine, New York, NY 10065.
2. Present address: Newton Wellesley Hospital, 2014 Washington St, Newton, MA 02462.
3. Department of Pathology, Weill Cornell Medicine, New York, NY.
4. Department of Otolaryngology, Harvard Medical School, Boston, MA.
5. Massachusetts Eye and Ear Infirmary, Boston, MA.