[1] Univ Minnesota, Med Sch, Dept Family Med & Community Hlth, 717 Delaware St SE,Rm 425, Minneapolis, MN 55414 USA
[2] Georgia State Univ, Byrdine F Lewis Sch Nursing & Hlth Profess, Dept Nutr, Atlanta, GA 30303 USA
[3] Univ Minnesota, Coll Educ & Human Dev, Minneapolis, MN 55414 USA
[4] Univ Minnesota, Div Epidemiol & Community Hlth, Minneapolis, MN 55414 USA