Fan et al. BMC Cancer 2011, 11:320 http://www.biomedcentral.com/1471-2407/11/320 C-termini and their expression in epididymis and testis. J Cell Sci 2004, 117(Pt 18):4301-4311. 38. Shmelkov SV, Jun L, St Clair R, McGarrigle D, Derderian CA, Usenko JK, Costa C, Zhang F, Guo X, Rafii S: Alternative promoters regulate transcription of the gene that encodes stem cell surface protein AC133. Blood 2004, 103(6):2055-2061. Pre-publication history The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2407/11/320/prepub doi:10.1186/1471-2407-11-320 Cite this article as: Fan et al.: CD133: a potential indicator for differentiation and prognosis of human cholangiocarcinoma. BMC Cancer 2011 11:320. Page 8 of 8 Submit your next manuscript to BioMed Central and take full advantage of: • Convenient online submission • Thorough peer review • No space constraints or color ﬁgure charges • Immediate publication on acceptance • Inclusion in PubMed, CAS, Scopus and Google Scholar • Research which is freely available for redistribution Submit your manuscript at www.biomedcentral.com/submit