Xue, Jun
Zhong, Shan
Sun, Bo-min
Sun, Qing-Fang
Hu, Liang-Yun
Pan, Si-Jian
Funding for this research was provided by:
Foundation of Shanghai Municipal Commission of Health and Family Planning (201640210)
Article History
Received: 11 April 2019
Revised: 2 September 2019
Accepted: 9 September 2019
First Online: 14 November 2019
Conflict of interest
: The authors declare that they have no conflict of interest.