[1] Univ Alabama Birmingham, Dept Med, Div Prevent Med, Birmingham, AL USA
[2] Univ Alabama Birmingham, Sch Publ Hlth, Dept Biostat, Birmingham, AL USA
[3] Univ Arizona, Dept Med, Tucson, AZ USA
[4] Univ Mississippi, Med Ctr, Dept Med, Jackson, MS USA
[5] East Carolina Univ, Dept Publ Hlth & Family Med, Brody Sch Med, Greenville, NC USA
[6] East Carolina Univ, Dept Family Med, Brody Sch Med, Greenville, NC USA
[7] Dalhousie Univ, Fac Med, Dept Community Hlth & Epidemiol, Halifax, NS, Canada
[8] Univ Alabama Birmingham, Dept Epidemiol, Birmingham, AL USA
[9] Cornell Univ, Weill Med Coll, Div Gen Internal Med, Dept Med, New York, NY USA
[10] Univ Alabama Birmingham, Dept Med, Div Prevent Med, 1717 11th Ave South,Suite 638, Birmingham, AL 35294 USA