1. Department of Otolaryngology – Head and Neck Surgery University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
2. Department of Biomedical Sciences, Faculty of Medicine University of Montreal Montreal Quebec Canada
3. Lady Davis Institute of the Jewish General Hospital McGill University Montreal Quebec Canada
4. Division of Geriatrics, Department of Medicine University of Montreal Montreal Quebec Canada
5. Department of Plastic and Reconstructive Surgery University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
6. Department of Diagnostic Radiology University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA