1. Department of Cancer Biology Abramson Family Cancer Research Institute University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
2. Institute for Diabetes, Obesity, and Metabolism University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
3. Division of Gastroenterology University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
4. Department of Biology University of Pennsylvania Philadelphia PA USA
5. Department of Chemistry University of Pennsylvania Philadelphia PA USA
6. Department of Biochemistry and Biophysics University of Pennsylvania Perelman School of Medicine Philadelphia PA USA