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. 2024 Mar 19;10:e47165. doi: 10.2196/47165

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©Sitong Luo, Kedi Jiao, Yuhang Zhang, Yutong Xu, Jingtao Zhou, Siwen Huang, Yan Li, Yongkang Xiao, Wei Ma, Lin He, Xianlong Ren, Zhen Dai, Jiaruo Sun, Qingyu Li, Feng Cheng, Wannian Liang. Originally published in JMIR Public Health and Surveillance (https://publichealth.jmir.org), 19.03.2024.

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 use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Public Health and Surveillance, is properly cited. The complete bibliographic information, a link to the original publication on https://publichealth.jmir.org, as well as this copyright and license information must be included.

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Map of the geographic location, per capita GDP, population size, and sample size of the 6 study sites in China. Note: The per capita GDP and population size of each study site were based on the data released by the National Bureau of Statistics of China in 2020. GDP: gross domestic product.