Chang et al. used publicly available data from The Cancer Genome Atlas (TCGA, https://cancergenome.nih.gov/, accessed on 26 February 2022) and Prognoscan (http://www.abren.net/PrognoScan/, accessed on 26 February 2022) databases, that contain more than 70 microarray studies of 13 different human cancer types, to examine the expression of 19 different ALDH isozymes and cancer prognosis [58]. The gene discussed is LDHA; the disease is cancer.