1. 1Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
2. 2Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
3. 3Department of Cell and Developmental Biology, Center for Stem Cell Biology, and Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
4. 4Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA