Following the publication of the above paper, it was drawn to the Editor's attention by a concerned reader that the images showing metastatic nodules in the mouse lung in Fig. 4 on p. 735 had apparently previously been published a few years earlier in the following paper: Jia D, Yan M, Wang X, Hao X, Liang L, Liu L, Kong H, He X, Li J and Yao M: Development of a highly metastatic model that reveals a crucial role of fibronectin in lung cancer cell migration and invasion. The gene discussed is FN1; the disease is lung cancer.