Fig. 3From: The Effect of immunonutrition in patients undergoing pancreaticoduodenectomy: a systematic review and meta-analysis Meta-analysis of the effect of IMN on hospitalization days Forest plot of length of hospital stay. The random-effects model was used. The square size of individual studies represented the weight of the study. Vertical lines represent 95% CI of the pooled estimate. The diamond represents the overall summary estimate, with the 95% CI given by its widthBack to article page