Ma, Chao http://orcid.org/0000-0003-4378-1380
Liu, Guangxing
Liu, Wei
Xu, Wei
Li, Hongtu
Piao, Shuhua
Sui, Yang
Feng, Wenhua
Funding for this research was provided by:
Natural Science Foundation of Liaoning Province (2018225087)
Natural Science Foundation of Liaoning Province (2019-ZD-1093)
Shenyang Young and Middle-aged Science and Technology Innovation Talent Support Project (RC180301)
Article History
Received: 27 April 2020
Accepted: 13 March 2021
First Online: 26 March 2021
Declarations
:
: The authors declare that they have no competing interests.
: The study was approved by the Ethics Committee of Liaoning Province Research Institute of Family Planning<b>.</b>