evidence: Causes of Hypoxemia in COVID-19 - PMID: 35283538 - PMCID: PMC8897613 - DOI: 10.1134/S0022093022010070 Causes of Hypoxemia in COVID-19 [...] Silent Hypoxemia in COVID-19 Pneumonia.Adv Exp Med Biol. 2022;1395:117-122. doi: 10.1007/978-3-031-14190-4_20. Adv Exp Med Biol. 2022. PMID: 36527624 -