RETRACTED ARTICLE: TGF-β secreted by tumor-associated macrophages promotes proliferation and invasion of colorectal cancer via miR-34a-VEGF axis

We, the Editors and Publisher of the journal <i>Cell Cycle</i>, have retracted the following article: Danhua Zhang, Xinguang Qiu, Jianhua Li, Shouhua Zheng, Liwen Li, and Hongchao Zhao. TGF-β secreted by tumor-associated macrophages promotes proliferation and invasion of colorectal cancer via miR-34a-VEGF axis. Cell Cycle. 2018;17(24):2766-2778, doi:10.1080/15384101.2018.1556064. Since publication, concerns have been raised about the integrity of the data in the article. When approached for an explanation, the authors have been unable to fully address the concerns raised with adequate explanations and have not been able to provide their all original data in the appropriate format. As verifying the validity of published work is core to the integrity of the scholarly record, we are therefore retracting the article. The corresponding author listed in this publication has been informed. We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions. The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as ‘Retracted’.