Lu, Dan
Ran, Menglin
Liu, Yifan
Xia, Ji
Bi, Liyan
Cao, Xiaowei
Funding for this research was provided by:
Contract for Maternal and Child Health Research Projects in Jiangsu Province (No. F201809)
Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No.17KJB416012)
National Natural Science Foundation of China (No. 81701825)
Yangzhou Science and Technology Project (No.YZ2017075)
Social Development Foundation of Jiangsu (No. BE2018684)
Article History
Received: 19 May 2020
Revised: 17 July 2020
Accepted: 22 July 2020
First Online: 31 July 2020
Compliance with ethical standards
: This study was approved by the Ethics Committee of the College of Clinical Medicine of Yangzhou University and followed the guidelines of the Declaration of Helsinki.
: The authors declare that they have no conflict of interest.