Zhang, Chuan
Wang, Xing
Hao, Shengju
Zhang, Qinghua
Zheng, Lei
Zhou, Bingbo
Liu, Furong
Feng, Xuan
Chen, Xue
Ma, Panpan
Chen, Cuixia
Cao, Zongfu
Ma, Xu
Funding for this research was provided by:
Non-profit Central Research Institute Fund of National Research Institute For Family Planing (2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07, 2019GJZ07)
Article History
Received: 7 April 2020
Accepted: 14 July 2020
First Online: 27 July 2020
Competing interests
: The authors declare no competing interests.