1. Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism; School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205, USA
2. Welch Prevention Center for Prevention, Epidemiology and Clinical Research; Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA;
3. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA