Created at	Source	Raw Value	Validated value
Oct. 27, 2021, 11 a.m.	usa	inclusion criteria: - age ≥18 years. - severe hypoxemic respiratory failure (partial pressure of arterial oxygen/ fraction of inspired oxygen < 250 mmhg). - confirmed sars-cov2 infection. - radiological images compatible with pneumonia covid.	inclusion criteria: - age ≥18 years. - severe hypoxemic respiratory failure (partial pressure of arterial oxygen/ fraction of inspired oxygen < 250 mmhg). - confirmed sars-cov2 infection. - radiological images compatible with pneumonia covid.