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    • Hair zinc levels in rural Costa Rican infants and preschool children 

      O’Leary, M.J; Mata Jiménez, Leonardo; Hegarty, P. V. J. (The American Journal of Clinical Nutrition: 33; p. 2194-2197, 1980-10)
      Correlations between hair zinc and age, sex, weight, and length were determined on 138 boys and girls aged 6 months to 4 years from a low socioeconomic region of rural Costa Rica. Zinc deficiency, as assessed by hair zinc ...