title: Retraction note to: Characterization of cancer stem-like cells in the side population cells of human gastric cancer cell line MKN-45.
abstract: Retraction Note to: J Zhejiang Univ-Sci B (Biomed & Biotechnol) 2013 Mar.; 14(3):216-223. This article has been retracted at the authors' request, as it contains large portions of text and figures that have been previously published in the following article: Zhang, H., Xi, H., Cai, A., Xia, Q., Wang, X.X., Lu, C., Zhang, Y., Song, Z., Wang, H., Li, Q., Chen, L., Guo, Z., 2013. Not all side population cells contain cancer stem-like cells in human gastric cancer cell lines. Dig. Dis. Sci., 58(1):132-139. [doi:10.1007/s10620-012-2330-1]