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JZ, RP and JW contributed equally.
Correction notice This article has been corrected since it published Online First. The title has has been corrected.
Contributors JZ and RP conducted data analysis and wrote the manuscript. LZ contributed with comments during the writing. JW, YG and YY conducted data analysis. XX and LZ conceived the study.
Funding Key Foundation of Wuhan Huoshenshan Hospital (2020), Key Research & Development Program of Jiangsu Province (BE2018713), Medical Innovation Project of Logistics Service (18JS005).
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Provenance and peer review Not commissioned; internally peer reviewed.