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Effect of zinc supplementation in infants and children aged ≤3 y on iron deficiency (OR) by age group. Note: Zinc exposure corresponds to mg/d except for Rosado et al. (59) for which doses were given 6 d/wk. FA, folic acid; IFA, iron plus folic acid; M-H, Mantel-Haenszel test; Random, random effect model; 95% CI, 95% confidence interval; MMN, multiple micronutrients; Pl, placebo; Vit C, vitamin C.
