Patients
A total of 44 patients diagnosed with COVID-19 based on the World Health Organization’s interim guidance, from August 1st to September 1st, 2020, at The Third People’s Hospital of Shenzhen were enrolled in this study. 24 negative-control patients with no SARS-CoV-2 infection were selected randomly from inpatient departments at the same time. The study was approved by the Ethics Committee of The Third People’s Hospital of Shenzhen. Written informed consents were obtained from all participants enrolled in the study.