Correction: All-Trans Retinoic Acid Prevents Osteosarcoma Metastasis by Inhibiting M2 Polarization of Tumor-Associated Macrophages

In the original version of this article (1), incorrect IHC staining images were inadvertently used in Figs. 4G and 5E. Specifically, in Fig. 4G, incorrect images were used to represent IHC staining of CD209 in groups Clo and ATRA. In Fig. 5E, incorrect images were used to represent IHC staining of CD209 in the control and Clo+ATRA groups. The authors regret these errors, which do not alter the main conclusions of the study. The correct images have been provided in the latest online HTML and PDF versions of the article.