1. Department of Medicine, Division of Endocrinology and Metabolism, Western University St. Joseph's Hospital, London, Ontario, Canada
2. Department of Pathology and Laboratory Medicine, Western University and London Health Sciences Centre London, Ontario, Canada
3. Department of Otolaryngology-Head and Neck Surgery, Western University London Health Sciences Centre, London, Ontario, Canada
4. Department of Medicine, Division of Medical Oncology, Western University London Regional Cancer Program, London, Ontario
5. Endocrine Oncology Site Group, Princess Margaret Cancer Centre, Toronto, Ontario, Canada