1. Winston-Salem, North Carolina, New York, New York, Miami, Florida, and Kansas City, Missouri
2. Center for Voice Disorders of Wake Forest University, Winston-Salem, NC
3. Department of Otolaryngology-Head and Neck Surgery, New York Presbyterian Hospital, College of Physicians and Surgeons, Columbia University, New York, NY
4. Department of Otolaryngology, University of Miami Medical Center, Miami, FL
5. Department of Otolaryngology, Kansas City, MO.