Xu, Jianwei
Du, Xiaofu
Bai, Yamin
Fang, Le
Liu, Min
Ji, Ning
Zhong, Jieming
Yu, Min
Wu, Jing
Funding for this research was provided by:
Chinese Center for Disease Control and Prevention (2018A203, 2018A203, 2018A203, 2018A203, 2018A203, 2018A203, 2018A203, 2018A203)
Article History
Received: 30 July 2019
Revised: 9 October 2019
Accepted: 9 October 2019
First Online: 28 October 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.