Wu, Wenbin
Wang, Xingling
Li, Yushan
Zhang, Yuchao
Article History
Received: 9 November 2019
Accepted: 5 March 2020
First Online: 16 March 2020
Compliance with ethical standards
:
: The authors have no conflict of interest to declare.
: This study was approved by the Ethics Committee of the Reproductive Center of the third affiliated hospital of Zhengzhou University.