1. Diabetes Center, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
2. University of North Carolina School of Medicine, Chapel Hill, North Carolina
3. Clinical Trials Unit, Charles R. Drew University, Los Angeles, California
4. Diabetes Center, VU University Medical Center, Amsterdam, the Netherlands
5. Diabetes Trials Unit, Oxford Centre for Diabetes, Endocrinology and Metabolism, Oxford University, Oxford, U.K.
6. Department of Internal Medicine and Endocrinology, Yale University School of Medicine, New Haven, Connecticut
7. Departments of Endocrinology and Metabolism, Mount Sinai Hospital, University of Toronto, Toronto, Canada