[1] Univ South Carolina, Dept Epidemiol & Biostat, Columbia, SC USA
[2] Univ South Carolina, South Carolina SmartState Ctr Healthcare Qual, Columbia, SC USA
[3] Univ South Carolina, Affiliate Off Study Aging, Arnold Sch Publ Hlth, Columbia, SC USA
[4] Univ South Carolina, Rural & Minor Hlth Res Ctr, Columbia, SC USA
[5] Univ Rhode Isl, Hlth Studies, Kingston, RI USA