RETRACTION: Y. Wang, T. Yang, Y. Han, Z. Ren, J. Zou, J. Liu, S. Xi, “lncRNA OTUD6B‐AS1 Exacerbates As2O3‐Induced Oxidative Damage in Bladder Cancer via miR‐6734‐5p‐Mediated Functional Inhibition of IDH2,” Oxidative Medicine and Cellular Longevity 2020, https://doi.org/10.1155/2020/3035624. Here, IDH2 is linked to urinary bladder cancer.