Cheng, Chen
Zhao, Hongyan
Tian, Wei
Hu, Chunhong
Zhao, Haitao
Funding for this research was provided by:
General Scientific Research Project of Lianyungang Municipal Health and Family Planning Commission (F-201834)
Maternal and Child Health Research Project of Jiangsu Province (1-201433)
Article History
Received: 19 August 2021
Accepted: 28 September 2021
First Online: 16 October 2021
Declarations
:
: I confirm that I have read the Editorial Policy pages. This study was conducted with approval from the Ethics Committee of First Affiliated Hospital of Soochow University. This study was conducted in accordance with the declaration of Helsinki. Written informed consent was obtained from all participants.
: All participants signed a document of informed consent.
: The authors declare that they have no competing interests.