1. Division of Endocrinology, Metabolism and Molecular Medicine, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
2. Divisions of Endocrinology and Obstetrics, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
3. Division of Endocrinology, Metabolism and Diabetes, Department of Internal Medicine, The Ohio State University, Columbus, Ohio, USA.
4. Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.