1. Departments of Medicine and Physiology and Banting and Best Diabetes Centre, University of Toronto , Toronto, ON M5G 2C4 , Canada
2. Department of Nutrition Science, Purdue University , West Lafayette, IN 47907 , USA
3. Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan , Saskatoon, SK S7N 5E5 , Canada
4. Maccabi Healthcare Services, Endocrinology Division , Tel Aviv 6812509 , Israel
5. Kensington Screening Clinic, Department of Medicine, University of Toronto , Toronto, ON M5T 3A9 , Canada