Geng, Zhi Yu
Zhang, Yan
Bi, Hui
Zhang, Dai
Li, Zheng
Jiang, Lu
Song, Lin Lin
Li, Xue Ying
Article History
Received: 14 November 2022
Accepted: 9 January 2023
First Online: 12 January 2023
Declarations
:
: The study was approved by the Ethics committee of Peking University First Hospital (Reference Number: 2020–247, on 30/10/2020) and registered prior to patient enrollment at Chinese Clinical Trial Registry (ChiCTR2000040343, on 28/11/2020). Written informed consent was obtained from each recruited parturient after providing them with adequate explanations regarding the aims of this study. The principles of Declaration of Helsinki were followed for this study.
: Not applicable.
: The authors declare that they have no competing interests.