Jiang, Liying
Shen, Junjie
Zhao, Yuxia
Li, Jianwen
Liu, Sana
Liu, Yujie
Wang, Huijun
Su, Chang
Zhuang, Xun
Chen, Nianhong
Liu, Aidong
Funding for this research was provided by:
Shanghai Municipal Education Commission (201840297)
Article History
Received: 12 March 2019
Accepted: 31 March 2020
First Online: 27 April 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Ethics Committee of the China Center for Disease Control and Prevention.
: All participants provided written informed consent.
: The authors declare that they have no competing interests.