1. From the Faculty of Medicine, Division of Otolaryngology, Dalhousie University, Halifax, Nova Scotia, Canada.
2. Department of Surgery, Dalhousie University, Halifax, Nova Scotia, Canada.
3. Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada.
4. Division of Rheumatology, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.