The authors informed the journal that an error occurred in their manuscript. The authors selected the wrong figure when uploading it due to the similarity of figures. They found this error when they were periodically sorting the experimental data and contacted the journal. This change does not affect the final results and conclusion. Reference: 1. Dalong Xie, Chao Shang, Hui Zhang, Yan Guo, Xiaojie Tong: Upregulation of miR-9 Target CBX7 Regulates Invasion Ability of Bladder Transitional Cell Carcinoma. Med Sci Monit 2015; 21: 225-230. DOI: 10.12659/MSM.893232