Affiliation: | 1. DNA Repair Section, Dermatology Branch, Center for Cancer Research, National Cancer Institute, , Bethesda, Maryland;2. Genetics Branch, Center for Cancer Research, National Cancer Institute, , Bethesda, Maryland;3. Office of the Air Force Surgeon General, , Washington, DC;4. Otolaryngology Branch, National Institute of Deafness and Communication Disorders, , Bethesda, Maryland;5. Radiology Branch, Clinical Center, National Institutes of Health, , Bethesda, Maryland |