Zheng, Xiaosong
He, Xiaojun
Article History
Received: 5 January 2023
Accepted: 31 May 2023
First Online: 1 July 2023
Declarations
:
: All methods were carried out in accordance with relevant guidelines and regulations, and this study was approved by the Medical Ethics Committee of Maternal and Child Health Hospital of Hubei Province. Because the study was based on a retrospective non-interventional design, the requirement to obtain informed consent was waived (Medical Ethics Committee of Maternal and Child Health Hospital of Hubei Province).
: Not applicable.
: The authors declare no competing interests.