- Immunohistochemical analysis of thymidylate synthase, thymidine phosphorylase, and dihydropyrimidine dehydrogenase in rectal cancer (cUICC II/III): correlation with histopathologic tumor regression after 5-fluorouracil-based long-term neoadjuvant chemoradiotherapy. Jakob, C., Liersch, T., Meyer, W., Baretton, G.B., Häusler, P., Schwabe, W., Becker, H., Aust, D.E. Am. J. Surg. Pathol. (2005)