Therapeutic plasma exchange followed by convalescent plasma transfusion in severe and critically ill COVID-19 patients: A single centre non-randomized controlled trial

Data collected consisted of demographic patient data: age, sex, BMI and clinical data: comorbidities, onset of the viral infection to treatment (days), severity of the disease, apache II, length of stay, outcome, days of invasive mechanical ventilation, days of non-invasive ventilation, PaO2/Fio2, CRP, Ferritin, LDH before and 7 days after the treatment, antiviral of choice.