1. Atlanta Diabetes Associates, Atlanta, Georgia, USA.
2. Department of Pediatric Endocrinology, Yale School of Medicine, New Haven, Connecticut, USA.
3. Barbara Davis Center for Diabetes, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
4. Lexicon Pharmaceuticals, Inc., The Woodlands, Texas, USA.
5. Department of Diabetes, Endocrinology, and Clinical Research, Children and Youth Hospital Auf der Bult, Hannover Medical School, Hannover, Germany.
6. McNair Interests and McNair Medical Institute, Houston, Texas, USA.
7. Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
8. Department of Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA.