ALDH1A1 and glioblastoma: Human U87MG glioblastoma and human HCT116 colorectal cancer are labelled as ALDH1A3+ cell lines, HEK293T as ALDH1A2+ cell line, human foetal astrocytes (hASTRO) and CCD-18Co human colon fibroblasts as ALDH1A1+ cell line and 4T1 mammary carcinoma as triple negative ALDH1A subfamily.