6Liang JT, Huang KC, Cheng AL, et al. clinicopathological and mo- lecular biological features of colorretal cancer in paticnts less than 40 years of age[J]. BrJ Surg. ,2003,90(2):205-214.
7Rossi O, van Baarlen P, Wells JM. Host - Recognition of Pathogens and Commensals in the Mammalian Intestine[J~. Curr Top Microbiol Immunol, 2011,12 ( 17 ) : 258 - 259.
