human 15 extracorporeal oxygenation 13 Humans 12 Extracorporeal Membrane Oxygenation 10 COVID-19 9 Extracorporeal membrane oxygenation 7 female 7 male 7 retrospective study 7 extracorporeal membrane oxygenation 6 Retrospective Studies 5 ECMO 4 Male 4 Respiratory Distress Syndrome 4 adult 4 artificial ventilation 4 controlled study 4 coronavirus disease 2019 4 hospital mortality 4 mortality 4 procedures 4 respiratory distress syndrome 4 Article 3 Female 3 Oxygenation 3 Respiratory therapy 3 Shock, Cardiogenic 3 cardiogenic shock 3 case report 3 major clinical study 3