Luo, Lingfei
Gu, Yiqin
Wang, Xiaoguang
Zhang, Yinghua
Zhan, Longwen
Liu, Jiqian
Yan, Hongjing
Liu, Yun
Zhen, Shanshan
Chen, Xiuhua
Tong, Rui
Song, Chiping
He, Yingying
Funding for this research was provided by:
This work was supported by a grant of the Shanghai Municipal Commission of Health and Family Planning
Article History
Received: 31 August 2018
Accepted: 29 June 2019
First Online: 10 July 2019
Competing Interests
: The authors declare no competing interests.