BRAF and colorectal cancer: Lochhead Lochhead P P Kuchiba Kuchiba A A Imamura Imamura Y Y Microsatellite instability and BRAF mutation testing in colorectal cancer prognostication Microsatellite instability and BRAF mutation testing in colorectal cancer prognostication J Natl Cancer Inst J Natl Cancer Inst 2013 2013 105 105 1151 1151 1156 1156 10.1093/jnci/djt173 10.1093/jnci/djt173 supplied-pmid 23878352?