Tian, Lifeng
Xia, Leizhen
Liu, Hongbo
Kou, Yan
Huang, Zhihui
Wu, Xingwu
Fan, Lu
Huang, Jialyu
Wu, Qiongfang
Article History
Received: 16 September 2021
Accepted: 25 February 2022
First Online: 11 March 2022
Declarations
:
: The study protocol was approved by the Ethics Committee of Jiangxi Maternal and Child Health Hospital (JMCHH) affiliated with Nanchang University School of Medicine (No. 2021–01), and was carried out in compliance with the Declaration of Helsinki. According to the Ethics Committee of JMCHH, informed consents were waived due to the retrospective nature, and all patients’ data were used anonymously.
: Not applicable.
: The authors declare that they have no competing interests.