Ngakan Putu Parsama Putra, Aditya Sri Listyoko and Anthony Christanto (2021) “PaO2, SaO2, and PaO2/FiO2 Ratio as A Predictor Disease Severity in Hospitalized COVID-19 Patients”, Journal Of The Indonesian Medical Association, 70(12), pp. 253-259. doi: 10.47830/jinma-vol.70.12-2020-326.