PFKL and non-small cell lung carcinoma: Bioinformatics and RIP and RNA pull‐down assessed association of circDHTKD1 with upstream molecule Eukaryotic initiation factor 4A‐III (EIF4A3) or downstream molecule phosphofructokinase‐1 liver type (PFKL) and insulin‐like growth factor 2 mRNA binding protein 2 (IGF2BP2) in NSCLC cells.