1. Department of Medicine Division of Diabetes, Endocrinology & Metabolism Vanderbilt University School of Medicine Nashville Tennessee USA
2. Vanderbilt Weight Loss Center Vanderbilt University Medical Center Nashville Tennessee USA
3. Department of Surgery Vanderbilt University School of Medicine Nashville Tennessee USA
4. Metamor Institute Pennington Biomedical Research Center Baton Rouge Louisiana USA
5. Department of Pediatrics Vanderbilt University School of Medicine Nashville Tennessee USA