Zha, Qunwu http://orcid.org/0000-0003-1816-9552
Chai, Guorong
Zhang, Zhe-George
Sha, Yongzhong
Su, Yana
Funding for this research was provided by:
Lanzhou University (No. 2018ldbryb026)
Ministry of Education Key Projects of Philosophy and Social Sciences Research (No. 16JZD023)
fundamental research funds for the central universities (No. 020jbkyzy037)
Article History
Received: 20 May 2021
Accepted: 12 July 2021
First Online: 27 July 2021
Declarations
:
: This study needs no ethical approval for that no patient participated in this study, and the personal information about patients were fully protected, because the information collected in this study contains admission date, gender, age, date of discharge, place of residence, admission number, and did not include patient’s name and ID number.
: All authors consent to publish this article in Environmental Science and Pollution Research.
: The authors declare no competing interests.