Cai, Qing
Yang, Lian-juan
Chen, Jia
Yang, Hong
Gao, Zhi-qin
Wang, Xiu-li
Funding for this research was provided by:
National Natural Science Foundation of China (81573063)
National Natural Science Foundation of China (Grant number 81602770)
Project of Shanghai Municipal Commission of Health and Family Planning (20140388, 20164Y0248)
Article History
Received: 24 October 2017
Accepted: 25 April 2018
First Online: 16 May 2018
Compliance with Ethical Standards
:
: The authors declare that they have no competing interests.