Ma, Yueling
Yue, Li
Liu, Jiangtao
He, Xiaotao
Li, Lanyu
Niu, Jingping
Luo, Bin http://orcid.org/0000-0001-9324-8942
Funding for this research was provided by:
National Natural Science Foundation of China (4187050043)
Article History
Received: 7 October 2019
Accepted: 17 May 2020
First Online: 2 June 2020
Ethics approval and consent to participate
: The environmental data were collected from open access websites, so the consent to participate was not applicable. The hospital admission data were obtained and proved by Lanzhou center for disease control and prevention with official permission. The study protocol including data using was approved by the ethics committee of Lanzhou University (Project identification code: IRB190612–1).
: Not applicable.
: The authors declare that they have no conflict of interest.