Yao, J.; An, Y.; Wie, J.; Chen, P.; Miao, Y.; Ji, Z.; Lu, Z.; Wu, J.; Jiang, K.; Xu, Z. Cyclopamine Reverts Acquired Chemoresistance and down-Regulates Cancer Stem cell markers in Pancreatic Cancer cell lines. Swiss Med Wkly 2011, 141, w13208.