1. Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
2. Metabolic Disease Research, Novo Nordisk A/S, Måløv DK-2760, Denmark
3. Princess Margaret Hospital Cancer Centre, University Health Network, Ontario M5G 2M9, Canada
4. Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
5. Department of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada