ALDH1A1 and non-small cell lung carcinoma: The ALDH1A subfamily members include ALDH1A1, ALDH1A2 and ALDH1A3, with the ALDH1A1 isoform being most commonly associated with the tumour-initiating CSC phenotype and have been previously described and characterised in cisplatin-resistant NSCLC within our laboratory [27].