Combinatorial therapy for brain tumor and oesophageal squamous cell carcinoma:  A therapeutic mix encompassing metformin and navitoclax/ABT263 (MAN) inhibits the expression of Integrin a7 (ITGA7), impairs laminin-induced/FAK-mediated signalling, inhibits the proliferation of glioblastoma and oesophageal squamous cell carcinoma stem cells, suppresses tumor cell migration, reduces metastasis and prolongs survival, via down-regulation of its target gene, 5/February/2019, 6.21 am