1. Department of Family and Community Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
2. Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC, USA
3. Department of Sociology, Wake Forest University, Winston-Salem, NC, USA
4. Department of Epidemiology and Prevention, Division of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC, USA