[1] Med Univ S Carolina, Ctr Hlth Dispar Res, Charleston, SC 29425 USA
[2] Vanderbilt Univ, Sch Med, Dept Med, Nashville, TN 37212 USA
[3] Vanderbilt Univ, Sch Med, Diabet Res & Training Ctr, Vanderbilt Eskind Diabet Ctr, Nashville, TN 37212 USA
[4] Univ Connecticut, Ctr Hlth Intervent & Prevent, Storrs, CT USA
[5] Med Univ S Carolina, Dept Med, Charleston, SC 29425 USA
[6] Ralph H Johnson VA Med Ctr, Ctr Dis Prevent & Hlth Intervent Div Populat, Charleston, SC USA