COVID-19(7) Extracorporeal(5) Patient(5) SARS-CoV-2(5) extracorporeal membrane oxygenation(5) ECMO(5) Support(4) ARDS(4) acute respiratory distress syndrome(4) pandemic(4) survival(3) acute respiratory distress(3) syndrome(3) Treatment(3) patients(3) effective(3) lung(2) risk(2) Vaccine(2) retrospective(2) reduced(2) invasive(2) respiratory(2) the SARS-CoV-2(2) Mortality(2) Transport(2) Effect(2) Critically ill(2) intensive care unit(2) feasible(2)