Patient(43) COVID-19(36) Mortality(30) intensive care(28) ICU(28) outcome(24) patients(23) Admission(20) hospital(19) patients with COVID-19(17) Critical care(16) intensive care unit(16) renal replacement therapy(15) mechanical ventilation(15) Treatment(15) death(14) median(14) COVID‐19(13) COVID‐19(13) age(13) Characteristics(13) plasma(13) Cohort(13) Result(13) ARDS(13) Trial(12) collected(12) analysed(12) Primary outcome(12) COVID-19 patient(11)