Fig. 1From: Piperacillin concentration in relation to therapeutic range in critically ill patients – a prospective observational studyDistribution of piperacillin trough levels over the course of 4 days. Trough levels a for all patients b for patients receiving piperacillin-tazobactam (PIP-TAZ) three times daily, and c for patients receiving PIP-TAZ two times daily because of impaired renal function are shown. Boxplots represent medians and interquartile ranges, and the ends of the whiskers represent the 5th and 95th percentilesBack to article page