1. Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
2. Clinical Center for Research Excellence, Charles R. Drew University of Medicine and Science, Los Angeles, California
3. University of Texas Health Science Center, San Antonio, Texas
4. Diabetes Center, VU University Medical Center, Amsterdam, the Netherlands
5. Department of Medicine, University of California, San Diego, California
6. Department of Medicine, University of Vermont, Burlington, Vermont
7. Departments of Endocrinology and Metabolism, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada