[1] Univ S Carolina, Arnold Sch Publ Hlth, Dept Epidemiol & Biostat, Columbia, SC 29208 USA
[2] Univ S Carolina, S Carolina Statewide Canc Prevent & Control Progr, Columbia, SC 29208 USA
[3] Univ S Carolina, Dept Exercise Sci, Arnold Sch Publ Hlth, Columbia, SC 29208 USA