Patients.
pneumonia, (RT-PCR)-confirmed SARS-CoV-2 infection
PNEUMONIA
Participants who gave informed consent were assessed for eligibility. The inclusion criteria were age 19 years or older, real-time reverse transcription-PCR (RT-PCR)-confirmed SARS-CoV-2 infection, mild to moderate COVID-19, and one or more COVID-19 symptoms. Patients with mild COVID-19 had symptoms of COVID-19 but did not have signs of pneumonia on chest radiography; moderate COVID-19 was defined as subjects with pneumonia but without evidence of severe pneumonia; and severe pneumonia was defined as presenting oxygen saturation (SpO