1 Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada.
2 Division of Nephrology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.
3 Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
4 Barbara Davis Center for Diabetes, University of Colorado Denver, Aurora, Colorado.
5 Department of Diabetes, Endocrinology, and Clinical Research, Children's and Youth Hospital Auf der Bult, Hannover Medical School, Hannover, Germany.
6 Research Division, Department of Medicine, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts.
7 Departments of Pediatrics and Medicine, University of Minnesota, Minneapolis, Minnesota.
8 Lexicon Pharmaceuticals, Inc., The Woodlands, Texas.