(B) Boxplots summarizing the expression of INHBB, TGFB1 and TGFB3 ligands of the TGFβ/Activin pathway in the different groups of MB (blue WNT, red SHH, yellow Group 3 and green Group 4) and in fetal and adult cerebellum (grey) in the dataset of "Data ref: Cavalli et al, 2017". Wilcoxon rank-sum tests were performed to determine p-values for panel B. p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001. 