Fig. 7From: Value of variation of end-tidal carbon dioxide for predicting fluid responsiveness during the passive leg raising test in patients with mechanical ventilation: a systematic review and meta-analysisDeeks’ funnel plot of publication bias among studies. ESS = effective sample size. Numbers 1 to 6 represent the study arms (Monge/2012, Monnet/2013, Zang/2013, Wang/2015, Toupin/2016, Yao/2016)Back to article page