1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD , USA
2. Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins School of Medicine , Baltimore, MD , USA
3. Department of Medicine, Rutgers Robert Wood Johnson Medical School , New Brunswick, NJ , USA
4. Division of Pulmonary, Critical Care, and Sleep Medicine, University of Miami, Miller School of Medicine , Miami, FL , USA