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Authors
Chen, Zhen-zhou
Huang, Wang
Chai, Ning-hui
Qiu, Yu-hao
Wei, Zheng-qiang
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Funding
Funding for this research was provided by:
Medical Research Project of Chongqing Municipal Health and Family Planning Commission (No.2018ZDXM007)
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Article History
Received: 27 August 2021
Accepted: 22 November 2021
First Online: 11 May 2022
Declarations
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: The authors declare no competing interests.
: This study was retrospective, and we only collected data that did not involve any risk to the patient. Thus, the approval by the Institutional Review Committee of the First Affiliated Hospital of Chongqing Medical University was waived.
