1. Division of Endocrinology, Diabetes, and Metabolism, Los Angeles, California, USA.
2. Department of Medicine, Los Angeles, California, USA.
3. Statistics Core, Department of Medicine, Los Angeles, California, USA.
4. Division of Hematology and Oncology; UCLA David Geffen School of Medicine, Los Angeles, California, USA.
5. Division of Endocrinology, Diabetes, and Metabolism, University of Southern California Keck School of Medicine, Los Angeles, California, USA.