Seymour Seymour MT MT Brown Brown SR SR Middleton Middleton G G Panitumumab and irinotecan versus irinotecan alone for patients with KRAS wild-type, fluorouracil-resistant advanced colorectal cancer (Piccolo): a prospectively stratified randomised trial Panitumumab and irinotecan versus irinotecan alone for patients with KRAS wild-type, fluorouracil-resistant advanced colorectal cancer (Piccolo): a prospectively stratified randomised trial Lancet Oncol Lancet Oncol 2013 2013 14 14 749 749 759 759 10.1016/S1470-2045(13)70163-3 10.1016/S1470-2045(13)70163-3 supplied-pmid 23725851? This evidence concerns the gene KRAS and colorectal cancer.