1. Faculty of Dentistry; McGill University; Montreal QC Canada
2. Department of Biomedical Sciences; University of Cagliari, Cittadella Universitaria di Monserrato; Monserrato Cagliari Italy
3. Department of Otolaryngology; Hôpital Royale Victoria McGill University; Montreal QC Canada
4. Department of Oral and Maxillofacial Surgery; McGill University Health Centre, Montreal General Hospital McGill University; Montreal QC Canada