[1] Univ Minnesota, Sch Publ Hlth, Div Epidemiol & Community Hlth, 1300 S 2nd St,Suite 300, Minneapolis, MN 55454 USA
[2] Univ North Texas, Hlth Sci Ctr Ft Worth, North Texas Primary Care Practice Based Res Netwo, 3500 Camp Bowie Blvd, Ft Worth, TX 76107 USA
[3] Univ North Texas, Hlth Sci Ctr Ft Worth, Texas Coll Osteopath Med, Dept Family Med, 3500 Camp Bowie Blvd, Ft Worth, TX 76107 USA
[4] Univ North Texas, Hlth Sci Ctr Ft Worth, Texas Coll Osteopath Med, Dept Pediat, 3500 Camp Bowie Blvd, Ft Worth, TX 76107 USA