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. 2021 Apr 27;9:671504. doi: 10.3389/fped.2021.671504

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Copyright © 2021 Bu, Popovic, Huang, Fu and Gardasevic.

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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Scatter plots with linear regression lines of gross domestic product (GDP) and body mass index (BMI) of Chinese boys aged 5–19 with respective Pearson correlation coefficients. Dotted lines represent 95% confidence interval.