Created at	Source	Raw Value	Validated value
July 14, 2021, 6 a.m.	usa	inclusion criteria: - aged ≥18 years - laboratory-confirmed sars-cov- 2 infection - hospitalized patients - need reservoir mask for oxygen support - need hfnc for oxygen support	inclusion criteria: - aged ≥18 years - laboratory-confirmed sars-cov- 2 infection - hospitalized patients - need reservoir mask for oxygen support - need hfnc for oxygen support