1. Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, UCLA David Geffen School of Medicine, Los Angeles, CA 90095, USA
2. Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, VA Greater Los Angeles Healthcare System, Los Angeles, CA 90073, USA
3. The Ohio State University College of Medicine, Columbus, OH 43210, USA
4. Department of Pathology, Keck Medical Center of USC, Los Angeles, CA 90033, USA
5. Department of Medicine, UCLA David Geffen School of Medicine, Los Angeles, CA 90095, USA
6. Division of Endocrinology, Diabetes, and Metabolism; The Ohio State University and Arthur G. James Cancer Center, Columbus, OH 43210, USA