Fig. 6From: Efficacy and safety of human umbilical cord-derived mesenchymal stem cells for COVID-19 pneumonia: a meta-analysis of randomized controlled trialsForest plot showing changes in IL-6 in MSC and control groups 7Â days after injection. CI, confidence interval; IV, Inverse-variance method; Chi2, Chi-Squared Test; df, degrees of freedom; I2, I-squared statisticBack to article page