1. Georgetown Public Hospital Corporation and Department of Surgery, University of Guyana, Georgetown, Guyana
2. IWK Health Centre and Division of Otolaryngology-Head & Neck Surgery, Department of Surgery, Dalhousie University, 5850/5980 University Avenue, P.O. Box 9700, Halifax, NS, Canada B3K 6R8
3. School of Human Communication Disorders, Dalhousie University, Halifax, NS, Canada B3H 4R2