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A prospective observational study was conducted. Self-complete questionnaires recorded socio-demographic characteristics, health behaviours and supplementation practices for 158 mother-infant dyads at 4, 9 and 12 months post-partum. A 2-day food diary was also obtained on 12-month-old infants to examine the contribution of diet to vitamin D intakes.
Bennett, A.E. & Kearney, J.M. (2018). Predictors of Vitamin D Supplementation Amongst Infants in Ireland Throughout The First Year of Life. Journal of Public Health, vol. 26, no. 5, pg. 577-583. doi.org/10.1007/s10389-017-0891-3