Zou, Haimin
Zhou, Chen
Li, Yongxin
Yang, Xiaosong
Wen, Jun
Li, Changxiong
Song, Shaojie
Sun, Chengjun http://orcid.org/0000-0002-9458-6510
Funding for this research was provided by:
Chengdu Center for Disease Control and Prevention (No.20190102)
Article History
Received: 21 November 2019
Revised: 3 February 2020
Accepted: 12 February 2020
First Online: 27 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.