1. Ear, Nose, and Throat Department, University of Toronto (Dr. Elden)
2. Department of Radiology, University of Toronto
3. The Toronto Hospital, Hôpital de Bicetre
4. Division of Neuroradiology, Hôpital de Bicetre
5. Department of Anatomy/Radiology, Hôpital de Bicetre
6. Department of Otolaryngology, University of Toronto