1. Listen for Life Center, Department of Otolaryngology‐Head and Neck Surgery Virginia Mason Medical Center Seattle Washington U.S.A.
2. Department of Otolaryngology‐Head and Neck Surgery University of Miami Miami Florida U.S.A.
3. Cleveland Clinic Head and Neck Institute Cleveland Ohio U.S.A.
4. Department of Otolaryngology‐Head and Neck Surgery, The University of Iowa Cochlear Implant Clinical Research Center University of Iowa Iowa City Iowa U.S.A.