Fig. 3From: Efficacy and safety of human umbilical cord-derived mesenchymal stem cells for COVID-19 pneumonia: a meta-analysis of randomized controlled trialsForest plot showing the difference in the effect of MSC therapy and control treatment on the mortality rate. CI, confidence interval; M–H, Mantel–Haenszel method; Chi2, Chi-Squared Test; df, degrees of freedom; I2, I-squared statisticBack to article page