[1] Univ N Carolina, Dept Nutr, Chapel Hill, NC 27514 USA
[2] Univ N Carolina, Dept Epidemiol, Chapel Hill, NC 27514 USA
[3] Univ Alabama, Dept Med, Div Prevent Med, Birmingham, AL 35294 USA
[4] Univ Minnesota, Div Epidemiol, Minneapolis, MN 55455 USA
[5] Univ New Mexico, Sch Med, Dept Pediat, Albuquerque, NM 87131 USA
[6] Gila River Indian Community, Dept Hlth Serv, Sacaton, AZ USA
[7] Johns Hopkins Univ, Sch Hyg & Publ Hlth, Dept Int Hlth, Div Human Nutr, Baltimore, MD USA
[8] Univ Arizona, Dept Physiol, Tucson, AZ USA