[Corrigendum] All-trans retinoic acid restored the osteogenic ability of BMP9 in osteosarcoma through the p38 MAPK pathway

Subsequently to the publication of the above paper, the authors have realized that the images presented in Fig. 1A were selected erroneously (essentially, the images for group 'AdBMP9  ' were chosen to represent the group 'AdGFP'). A corrected version of Fig. 1, including the correct data for the experiments depicted in Fig. 1A, is shown opposite. Note that this change does not affect the results or the conclusions reported in this paper, and all the authors agree to this correction. The authors apologize to the Editor and to the readership of the Journal for any inconvenience caused. [the original article was published in International Journal of Oncology 50: 1363‑1371, 2017; DOI: 10.3892/ijo.2017.3910].