1. Department of Internal Medicine, Section on Endocrinology & Metabolism, Wake Forest School of Medicine, Winston-Salem, NC, USA;
2. Department of Economics, Wake Forest University, Winston-Salem, NC, USA;
3. Department of Internal Medicine Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA;
4. Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC, USA;
5. Department of Emergency Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA