Physiology / Nutrition / Food / Biology / Developing Countries / Brazil / Health / Population / Humans / Female / Rio de Janeiro / Male / Infant / Prevalence / Public health systems and services research / Iron Deficiency Anemia / Cross Sectional Studies / Brazil / Health / Population / Humans / Female / Rio de Janeiro / Male / Infant / Prevalence / Public health systems and services research / Iron Deficiency Anemia / Cross Sectional Studies