[1] Univ North Texas, Hlth Sci Ctr, Dept Family Med, Ft Worth, TX 76107 USA
[2] Univ North Texas, Hlth Sci Ctr, Inst Translat Res, Ft Worth, TX 76107 USA
[3] Univ Texas Monroe Dunaway Anderson Canc Ctr, Houston, TX USA
[4] Vanderbilt Univ, Med Ctr, Dept Biostat, Nashville, TN USA
[5] Univ Hawaii, Dept Quantitat Hlth Sci, Honolulu, HI 96822 USA