[1] Univ Calif Davis, Dept Nutr, Davis, CA 95616 USA
[2] Univ Calif Oakland, Nutr Policy Inst, Div Agr & Nat Resources, Oakland, CA 94607 USA
[3] Publ Hlth Fdn Enterprises WIC, 12781 Schabarum Ave, Irwindale, CA 91706 USA
[4] San Francisco Dept Publ Hlth, Communicable Dis Prevent Unit, 101 Grove St,Rm 406, San Francisco, CA 94102 USA
[5] Calif Dept Publ Hlth, WIC Div, 3901 Lennane Dr, Sacramento, CA 95834 USA