CP and colorectal cancer: 15 Lee Lee YM YM Leu Leu SY SY Chiang Chiang H H Fung Fung CP CP Liu Liu WT WT Human papillomavirus type 18 in colorectal cancer Human papillomavirus type 18 in colorectal cancer J Microbiol Immunol Infect J Microbiol Immunol Infect 2001 2001 34 34 2 2 87 87 91 91 supplied-pmid 11456365?