RETRACTION: Z. Li, Y. Song, and J. Zhang, “lncRNA PDCD4-AS1 Promotes the Progression of Glioma by Regulating miR-30b-3p/METTL7B Signaling,” Oxidative Medicine and Cellular Longevity 2023 (2023): 3492480, https://doi.org/10.1155/2023/3492480. Here, PDCD4 is linked to central nervous system cancer.