Fig. 1
Flowchart of the study participants. Abbreviations: COVID-19, coronavirus disease 2019; WHO-CPS, World Health Organization-Clinical Progression Scale; n, number
Fig. 1 | BMC Pulmonary Medicine
Flowchart of the study participants. Abbreviations: COVID-19, coronavirus disease 2019; WHO-CPS, World Health Organization-Clinical Progression Scale; n, number