[1] South Carolina SmartState Ctr Healthcare Qual, Columbia, SC USA
[2] Arnold Sch Publ Hlth, Dept Hlth Promot Educ & Behav, Columbia, SC USA
[3] Arnold Sch Publ Hlth, Dept Epidemiol & Biostat, Columbia, SC USA
[4] Arnold Sch Publ Hlth, Sch Med, Dept Internal Med, Columbia, SC USA
[5] Univ South Carolina, Arnold Sch Publ Hlth, Dept Hlth Serv Policy & Management, Columbia, SC USA
[6] Univ South Carolina, Columbia, SC 29208 USA