SNAI1 and glioblastoma: The invasion capacity was correlated to the expression of some (CDH2, MMP2, SNAI1, ZEB1) but not all known invasion markers in vitro and in vivo (Supplementary Fig. 1c–h), but did not correlate to transcriptional GBM subtypes (proneural, mesenchymal, classical) as defined by Wang et al.18 (Supplementary Fig. 1i).