Wu, Yu
Yuan, Yanling
Kong, Cai
Ma, Qiuyue
Ye, Hanfeng http://orcid.org/0000-0003-2128-026X
Jing, Wenzhan
Liu, Jue
Liu, Min http://orcid.org/0000-0002-5059-3743
Funding for this research was provided by:
National Natural Science Foundation of China (71874003)
Article History
Received: 8 May 2020
Accepted: 6 October 2020
First Online: 19 October 2020
Compliance with ethical standards
:
: We declare no competing interests.
: This study was approved by the Institutional Review Board of the Chinese Association of Maternal and Child Health Studies.
: All participants provided written informed consent before enrolment.
: All authors have read and approved the manuscript.