Fig. 2From: Systematic review and meta-analysis of complications and mortality of veno-venous extracorporeal membrane oxygenation for refractory acute respiratory distress syndrome Funnel plot of included studies. White circles represent observed studies. Mean point was computed using a random effects model and is presented as white rhomboid. Using the Trim and Fill method, one additional imputable study was identified. The estimated corrected mean point with confidence interval is presented as a black rhomboid Back to article page