MKI67 and neoplasm: Following the publication of this paper, it was drawn to the Editor's attention by a concerned reader that certain of the colony formation assay data shown in Fig. 2F, the tumor images in Fig. 3A, the "NC" experiment for the Ki67 immunohistochemical staining experiment shown in Fig. 3E and the migration assay data in Fig. 4D were strikingly similar to data appearing in different form in other papers by different authors at different research institutes that had either already been published, or were under consideration for publication at around the same time.