KCTD21 and squamous cell carcinoma: Data from TCGA also showed that KCTD21-AS1 levels increased in NSCLC tissues, including lung adenocarcinoma (n = 533, p < 0.01) and squamous cell carcinoma (n = 502, p < 0.01) tissues than in normal tissues (Supplementary Fig. 1b–d) through UALCAN analysis (http://ualcan.path.uab.edu/).