Chemoresistant colorectal cancer cells, the cancer stem cell phenotype, and increased sensitivity to insulin-like growth factor-I receptor inhibition - Dallas, N A; Xia, L; Fan, F; Gray, M J; Gaur, P; van Buren, G, 2nd; Samuel, S; Kim, M P; Lim, S J; Ellis, L M (Cancer Res, 2009)