Liu, Yue
Yu, Zhiheng
Zhao, Shigang
Cheng, Lei
Man, Yuanyuan
Gao, Xueying
Zhao, Han http://orcid.org/0000-0001-9515-7534
Article History
Received: 13 July 2020
Accepted: 2 November 2020
First Online: 20 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The approval was obtained from the ethics committee of the Center for Reproductive Medicine, Shandong University. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.
: Informed consent was obtained from all individual participants included in the study.