Jin, Zhen
Xiang, Rufang
Qing, Kai
Li, Xiaoyang
Zhang, Yunxiang
Wang, Lining
Zhu, Hongming
Mao, Yuanfei
Xu, Zizhen
Li, Junmin
Funding for this research was provided by:
National Natural Sciences Foundation of China (81600151)
Shanghai Municipal Bureau of health and Family Planning Commission (Grants 20154Y0168)
Article History
Received: 16 August 2017
Accepted: 6 May 2018
First Online: 15 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.