1. Montreal Diabetes Research Center and CRCHUM, Montréal, Québec, Canada
2. Institute for Research in Ophthalmology, Sion, Switzerland
3. Departments of Medicine and Biochemistry, Dartmouth Medical School, and Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire
4. Departments of Medicine, Physiology and Biophysics, Boston University School of Medicine, and Diabetes Unit, Section of Endocrinology, Boston University School of Medicine, and Boston Medical Center, Boston, Massachusetts, USA
5. Departments of Nutrition and Biochemistry, University of Montréal, Montréal, Québec, Canada