1. Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
2. Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
3. Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee
4. Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
5. United States Department of Veteran Affairs, Nashville, Tennessee
6. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
7. Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland