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. 2021 Jul 24;151(11):3361–3378. doi: 10.1093/jn/nxab265

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© The Author(s) 2021. Published by Oxford University Press on behalf of the American Society for Nutrition.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Comparison of infant 25(OH)D concentrations across treatment groups, and differentiated by breastfeeding pattern at 6 mo of age. Central line shows group median; lower and upper edges of the box denote 1st and 3rd quartile, respectively; lower and upper whiskers denote the lowest and highest values observed within 1.5 × IQR, respectively; outliers are represented by open (exclusive/predominant breastfeeding) and shaded (partial or no breastfeeding) dots. Placebo group is represented by 0:0 IU. P = 0.007 for interaction of breastfeeding pattern and vitamin D intake (as continuous variable) on infant 25(OH)D (multivariable Model D). 25(OH)D, 25-hydroxyvitamin D.