Funding for this research was provided by:
The special funding of New Coronary Pneumonia, Institute of China's System Research, Zhejiang University (YQYB2006)
Received: 22 July 2020
Accepted: 30 July 2021
First Online: 9 August 2021
: This study was approved by the Ethics Committee of Hangzhou Xixi Hospital (2020–24) and the First Affiliated Hospital, School of Medicine, Zhejiang University (FAHZJU) (2020-149). Individual informed consent was waived by the ethics committee listed above because this study used currently existing sample collected during the course of routine medical care and did not pose any additional risks to the patients. All patient data were anonymized prior to the analysis.
: Not applicable.
: The authors declare that they have no competing interests.