Liu, Yanyan
Zhou, Li
Zhang, Wenling
Yang, Yanjun
Yang, Yan
Pan, Li
Ba, Yupei
Wang, Ruijuan
Huo, Yanbei
Ren, Xiaoyu
Bai, Yana
Cheng, Ning
Funding for this research was provided by:
Lanzhou Talents Innovation and entrepreneurship Project (2019-RC-25)
the Lanzhou Chengguan District science and technology project (2020-2-11-13)
Article History
Received: 15 October 2021
Accepted: 18 March 2022
First Online: 26 May 2022
Declarations
:
: The research was approved by the Lanzhou Maternal and Child Health Care Hospital.
: Not applicable.
: The authors declare no competing interests.