[1] CDCP, Div Nutr Phys Act & Obes, Natl Ctr Chron Dis Prevent & Hlth Promot, Atlanta, GA 30333 USA
[2] McKing Consulting Corp, Atlanta, GA USA
[3] Univ Texas Austin, Dell Med Sch, Dept Pediat, Austin, TX USA
[4] US PHS, Commissioned Corps, Rockville, MD USA
[5] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA