1. Eaton-Peabody Laboratories; Massachusetts Eye and Ear Infirmary; Boston Massachusetts U.S.A.
2. Program in Speech Hearing Bioscience and Technology; Harvard-MIT Division of Health Sciences, and Technology; Cambridge Massachusetts U.S.A.
3. Department of Otology and Laryngology; Harvard Medical School; Boston Massachusetts U.S.A.
4. Hudson Valley Audiology Center; Pomona New York