1. Department of Otolaryngology–Head and Neck Surgery The Ohio State University School of Medicine, Columbus
2. Division of Pediatric Otolaryngology–Head and Neck Surgery Cincinnati Children's Hospital Medical Center
3. Department of Otolaryngology (Head and Neck Surgery), Stanford University Medical Center, Stanford, Calif.
4. Department of Otolaryngology–Head and Neck Surgery, University of Iowa College of Medicine, Iowa City