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. 2019 Aug 21;7:347. doi: 10.3389/fped.2019.00347

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Copyright © 2019 Li, Peng, Li, Christensen, Heckmann, Stenlund, Lönnerdal and Hernell.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Serum ferritin levels in the breastfed group and in the formula-fed groups. S-ferritin concentration was analyzed in a random sample consisting of 50 infants from each of the four groups. There was no difference in s-ferritin concentration among the formula-fed groups, but the F19 group was significantly lower than the breastfed group (p = 0.008), while there was no difference between the standard formula and MFGM and the breastfed group. There was a sex difference, with s-ferritin being higher in girls than in boys, a difference that was statistically significant for the breastfed and F19 groups. Error bars: 95% confidence intervals.