1. Department of Speech, Language and Hearing Sciences George Washington University Washington DC U.S.A.
2. Department of Hearing, Speech, and Language Sciences Gallaudet University Washington DC U.S.A.
3. Department of Communication Sciences and Disorders University of South Florida Tampa Florida U.S.A.
4. Audiology and Speech Pathology in Department of Otolaryngology Columbia University Irving Medical Center New York City New York U.S.A.
5. Communication Sciences and Disorders University of Kentucky College of Health Sciences Lexington Kentucky U.S.A.
6. The Cleveland Clinic Hearing Implant Program Cleveland Ohio U.S.A.