RETRACTION: Z. Jiang, T. Gong, and H. Wei, “CDKL5 Promotes Proliferation, Migration, and Chemotherapeutic Drug Resistance of Glioma Cells via Activation of the PI3K/AKT Signaling Pathway,” FEBS Open Bio 10, no. 2 (2020): 268‐277, https://doi.org/10.1002/2211‐5463.12780. This evidence concerns the gene CDKL5 and central nervous system cancer.