1. From the Clinical Nutrition and Risk Factor Modification Center and Department of Medicine, Divisions of Endocrinology and Metabolism, and Urology, St. Michael’s Hospital, Division of Urology, University Health Network Sunnybrook & Women’s College Health Sciences Centre, St. Joseph’s Health Centre, Departments of Nutritional Sciences, Medicine and Surgery, Faculty of Medicine, University of Toronto, Toronto, and Laboratory Services Division, University of Guelph, Guelph, Ontario, Canada