Abbreviations
NCP: novel coronavirus pneumonia; ARDS: acute respiratory distress
syndrome; SARS-CoV-2: severe acute respiratory syndrome coronavirus 2;
WHO: World Health Organization; NOS: Newcastle-Ottawa quality assessment
scale; IQR: interquartile range; OR: odds ratio; SARS-CoV: severe acute
respiratory syndrome associated coronavirus; MERS-CoV: middle East
respiratory syndrome coronavirus