Division of Endocrinology, Toronto General Hospital, 200 Elizabeth Street, 12 EN-212, Toronto, ON, M5G 2C4, Canada. sawkaam@yahoo.com. Department of Medicine, St. Michael's Hospital, 30 Bond Street, Shuter 2-026, Toronto, ON, M5B 1W8, Canada. Keenan Research Centre of the Li Ka Shing Knowledge Institute, University of Toronto, Toronto, ON, M5B 1W8, Canada. Department of Psychosocial Oncology, Princess Margaret Hospital, University Health Network, 16th Floor Room 724, 610 University Avenue, Toronto, ON, M5G 2M9, Canada. Department of Psychiatry and Palliative Care, Princess Margaret Hospital, University of Toronto, 16th Floor Room 724, 610 University Avenue, Toronto, ON, M5G 2M9, Canada. Department of Radiation Oncology, Princess Margaret Hospital, University Health Network, 5th Floor Room 963, 610 University Avenue, Toronto, ON, M5G 2M9, Canada. Department of Surgery, Toronto General Hospital, University Health Network, 200 Elizabeth Street, 10 EN-220, Toronto, ON, M5G 2C4, Canada. Toronto General Hospital, University of Toronto, 200 Elizabeth Street, 10 EN-220, Toronto, ON, M5G 2C4, Canada. Division of Endocrinology, Department of Medicine, Toronto General Hospital, University Health Network, 200 Elizabeth Street, 12 EN-216, Toronto, ON, M5G 2C4, Canada. Toronto General Hospital, University of Toronto, 200 Elizabeth Street, 12 EN-216, Toronto, ON, M5G 2C4, Canada. Department of Clinical Epidemiology and Biostatistics, McMaster University, 1280 Main Street West, CRL-208, Hamilton, ON, L8S 4K1, Canada. Endocrine Oncology Site Group, University Health Network, Toronto General Hospital, Endocrine Oncology 585 University Avenue, 9NU-986, Toronto, ON, M5G 2N2, Canada. Department of Otolaryngology Head and Neck Surgery, Wharton Head and Neck Centre, University Health Network, 3-952, 610 University Avenue, Toronto, ON, M5G 2M9, Canada. Wharton Head and Neck Centre, University of Toronto, 3-952, 610 University Avenue, Toronto, ON, M5G 2M9, Canada.