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. 2021 Nov 22;8:774487. doi: 10.3389/fmed.2021.774487

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Copyright © 2021 Ji, Wang, Bai, Long, Ma, Yan, Li, Wu and Yang.

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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Trends in composition of CS by parity and history of CS in 10 years from 2008 to 2017 in two hospitals.