Created at	Source	Raw Value	Validated value
Oct. 26, 2020, 11:31 p.m.	usa	inclusion criteria: - patients aged more than equal to 18 years. - covid-19 confirmed by reverse transcriptase-polymerase chain reaction (rt-pcr) - having severe pneumonia. - pao2 / fio2 <300.	inclusion criteria: - patients aged more than equal to 18 years. - covid-19 confirmed by reverse transcriptase-polymerase chain reaction (rt-pcr) - having severe pneumonia. - pao2 / fio2 <300.