1. Larry Hillblom Islet Research Center, UCLA David Geffen School of Medicine, Los Angeles
2. Division of Endocrinology, Diabetes and Hypertension, UCLA David Geffen School of Medicine, Los Angeles
3. Department of Molecular and Medical Pharmacology, UCLA David Geffen School of Medicine, Los Angeles
4. Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic, Rochester, Minnesota