1. Center for Auditory Prosthesis Research, Research Triangle Institute, Research Triangle Park, North Carolina 27709;
2. Division of Otolaryngology—Head and Neck Surgery, Department of Surgery, Duke University Medical Center, Durham, North Carolina 27710
3. Department of Otolaryngology—Head and Neck Surgery, Julius-Maximilians Universität, Würzburg, Germany;
4. Department of Otolaryngology—Head and Neck Surgery, University of Iowa, Iowa City, Iowa 52242;
5. Department of Oto-Rhino-Laryngology—Head and Neck Surgery, Johann Wolfgang Goethe Universität, Frankfurt, Germany;