The editors are publishing this note to alert readers to a concern about this article (1): Figure 2 is missing a splice line in the lanes between PDGF-BB 50 and 10, and the original data are not available for review. Reference 1. McGary EC, Weber K, Mills L, Doucet M, Lewis V, Lev DC, et al. Inhibition of platelet-derived growth factor-mediated proliferation of osteosarcoma cells by the novel tyrosine kinase inhibitor STI571. Clin Cancer Res 2002;8:3584–91.