1. Department of Medicine, University of Maryland Medical Center, Baltimore, Maryland, USA
2. Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
3. Indiana University School of Public Health, Department of Epidemiology and Biostatistics, Bloomington, Indiana, USA
4. Department of Medicine, Division of Endocrinology, Diabetes & Metabolism, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
5. Department of Epidemiology and Prevention, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA