Fig. 2From: Comparison of hydroxychloroquine, lopinavir/ritonavir, and standard of care in critically ill patients with SARS-CoV-2 pneumonia: an opportunistic retrospective analysisPrimary endpoint. Kaplan-Meier curve with the proportion of patients who needed treatment escalation (intubation, extracorporeal membrane oxygenation support, and renal replacement therapy) during the first 28 days of the intensive care unit stay. ICU, intensive care unitBack to article page