1. Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts;
2. Department of Cellular and Molecular Physiology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania;
3. Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Pennsylvania State University College of Medicine, Hershey, Pennsylvania;
4. Department of Medicine, Division of Endocrinology, Metabolism and Diabetes, University of Massachusetts Medical School, Worcester, Massachusetts.