Fig.1From: Low-dose intravenous plus inhaled versus intravenous polymyxin B for the treatment of extensive drug-resistant Gram-negative ventilator-associated pneumonia in the critical illnesses: a multi-center matched case–control studyFlowchart of the study inclusion process. VAP: ventilator-associated pneumonia; IH + IV, inhaled and intravenous; IV, intravenousBack to article page