Lin, Xuemei
Zhai, Ronghui
Mo, Jiafeng
Sun, Jingzhou
Chen, Peishan
Huang, Yuejun
Article History
Received: 31 October 2021
Accepted: 21 February 2022
First Online: 23 March 2022
Declarations
:
: This is a prospective cohort study conducted on pregnant women. The study protocol was approved by the research institute’s committee of human research in the Second Affiliated Hospital of Shantou University Medical College (NO.2016027) and abided by the standards of the Declaration of Helsinki. All methods were carried out in accordance with relevant guidelines and regulations. Informed consent was obtained from pregnancy women.
: All authors provided approval for publication of the content.
: The authors declare that they have no competing interests in our study.