Article History
Received: 29 May 2023
Accepted: 13 November 2023
First Online: 12 December 2023
Declarations
:
: All authors have approved the manuscript for submission and are without any potential competing interests.
: This study was approved by the Ethics Committee of Qinhuangdao First Hospital and the Ethics Committee of Qinhuangdao Maternal and Child Health Hospital with the ethics approval number 2021Q088.
: Patient consent was not required by the Ethics Committee due to the retrospective nature of the study and the anonymity of the data.