1. Department of Otolaryngology-Head and Neck Surgery; Georgetown University Medical Center; Washington DC
2. the Auditory Development and Restoration Program
3. the NIDCD National Temporal Bone Laboratory at University of California; Los Angeles
4. the Cellular and Molecular Biology of the Inner Ear Laboratory; University of California, Los Angeles School of Medicine; Los Angeles California U.S.A
5. the Division of Intramural Research; National Institute on Deafness and Other Communication Disorders; Bethesda Maryland