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. 2013 Jun 11;13:92. doi: 10.1186/1471-2431-13-92

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Copyright © 2013 Fenton et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Differences in weight gain velocity between between median Fetal-Infant Growth Reference 2013 (black) (based on a 6 country meta-analysis of intrauterine growth (22 to 40 weeks) and the World Health Organization Growth Standard (40 to 50 weeks)), and the Prem Growth study preterm infants (23–25 (red dot), 26–28 (blue dash), and 29–31 (purple dash dot) week), in g/kg/day, beginning at 1 week after birth. Positive and negative values on the graph represent when preterm infant weight gain velocity was higher than or lower than Fetal-Infant Growth Reference rates, respectively.