Colorectal cancer: CONTINUUM OF CARE - SYSTEMIC THERAPY FOR ADVANCED OR METASTATIC DISEASE...Patient appropriate for intensive therapy...Initial therapy...FOLFOX + (cetuximab or panitumumab)...FOLFIRI + (cetuximab or panitumumab)...or (cetuximab or panitumumab)...SUBSEQUENT THERAPY...Irinotecan (cetuximab or panitumumab)