The authors requested retraction after reviewing figures and determining that there were errors in the data. Reference: Yan Dong, Jun Yang, Liyuan Yang, Ping Li. Quercetin Inhibits the Proliferation and Metastasis of Human Non-Small Cell Lung Cancer Cell Line: The Key Role of Src-Mediated Fibroblast Growth Factor-Inducible 14 (Fn14)/Nuclear Factor kappa B (NF-kappaB) Pathway. Med Sci Monit, 2020; 26: e920537. DOI: 10.12659/MSM.920537.