SARS-CoV-2(30) COVID-19(30) Patient(21) Mortality(18) ICU(16) intensive care unit(13) Critically ill patient(13) ARDS(13) pandemic(12) hospital(12) syndrome(12) acute respiratory distress(12) Spanish(12) English(11) Respiratory failure(11) patients(11) with COVID-19(11) coronavirus disease(11) coronavirus(10) variable(10) age(10) carried(9) therapy(9) Pneumonia(9) COVID-19 patient(8) Critical care(8) Critically ill(8) Care(8) Tocilizumab(8) mechanical ventilation(8)