1. Department of Otolaryngology-Head & Neck Surgery; Baylor College of Medicine; Houston Texas
2. Department of Otolaryngology-Head & Neck Surgery; Boston University Medical Center; Boston Massachusetts
3. Department of Otolaryngology; University of Pittsburgh School of Medicine; Pittsburgh Pennsylvania
4. Division of Otolaryngology-Head & Neck Surgery; Duke University Medical Center; Durham North Carolina
5. Department of Otolaryngology-Head & Neck Surgery; Weill Cornell Medical College; New York New York