[1] Univ South Carolina, Arnold Sch Publ Hlth, Dept Epidemiol & Biostat, Columbia, SC 29208 USA
[2] Univ South Carolina, Arnold Sch Publ Hlth, Dept Hlth Promot Educ & Behav, Columbia, SC 29208 USA
[3] Prisma Hlth Upstate, Dept Internal Med, Greenville, SC USA
[4] Prisma Hlth Upstate, Dept Diabet Management, Greenville, SC USA