[1] Univ N Texas, Hlth Sci Ctr Ft Worth, Dept Hlth Policy & Management, Sch Publ Hlth, Ft Worth, TX 76107 USA
[2] Univ Texas San Antonio, Inst Demog & Socioecon Res, San Antonio, TX USA
[3] Univ Texas Med Branch, Dept Internal Med, Galveston, TX USA
[4] Univ N Texas, Hlth Sci Ctr Ft Worth, Dept Social & Behav Sci, Sch Publ Hlth, Ft Worth, TX 76107 USA
[5] Univ Texas Med Branch, Sealy Ctr Aging, Galveston, TX USA
[6] Univ Texas Med Branch, Dept Prevent Med & Community Hlth, Galveston, TX USA