1. Department of Medicine/Pulmonary Allergy & Critical Care; University of Alabama at Birmingham; Birmingham Alabama
2. Department of Otolaryngology; Northshore Hospital; Auckland New Zealand
3. Division of Laryngology & Professional Voice; Department of Otolaryngology & Communication Sciences; Medical College of Wisconsin; Milwaukee Wisconsin
4. Department of Surgery; University of Washington; Seattle; Washington
5. Division of Gastroenterology; Hepatology, and Endoscopy; Brigham and Homen's Hospital; Harvard Medical School, Cambridge; Massachusetts