Saigusa S, Tanaka K, Toiyama Y, Yokoe T, Okugawa Y, Kawamoto A, Yasuda H, Morimoto Y, Fujikawa H, Inoue Y, Miki C, Kusunoki M. Immunohistochemical features of CD133 expression: association with resistance to chemoradiotherapy in rectal cancer. Oncol Rep. 2010 Aug;24(2):345–50. doi: 10.3892/or_00000865. PMID: 20596619.