1. Division of Endocrinology, Diabetes and Metabolism; Department of Medicine; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
2. Department of Surgery; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
3. Departments of Pathology and Laboratory Medicine; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
4. Department of Radiology; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA