Keywords: ATCC; American Type Culture Collection; CCTCC; Cell line misidentification; China Center for Type Culture Collection; ECACC; European Collection of Cell Cultures; Glioma; NIN1/RPN12 binding protein 1 homolog; NOB1; RNA interference; RNAi; RT-PCR; U-251; U-373; U-87; real-time polymerase chain reaction.