Ao, Yuanyun
Zhou, Yesheng
Li, Dandi
Duan, Zhaojun
Funding for this research was provided by:
National Natural Science Foundation of China (31500139)
Article History
Received: 11 July 2019
Accepted: 19 September 2019
First Online: 16 December 2019
Compliance with ethical standards
:
: The authors declare that there are no conflicts of interest.
: This study protocol was approved by the Ethics Committee of China CDC and adhered to Chinese ethics laws and regulations.