Zheng, Minna http://orcid.org/0000-0002-0240-3044
Yu, Maohe
Cheng, Shaohui
Zhou, Ning
Ning, Tielin
Li, Long
Zhao, Fangning
Zhao, Xuan
Zhu, Jingjin
Jiang, Guohong
Funding for this research was provided by:
Health Industry Key Research Projects of Tianjin (14KG119)
Tianjin Center for Disease Control and Prevention Science and Technology Fund Projects (CDCKY1602)
Article History
Received: 17 June 2020
Accepted: 27 October 2020
First Online: 3 November 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Review Committee of Tianjin Centers of Disease Control and Prevention (Certificate Number: TJCDC0125, TJCDC2016003). Written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.