METHODS	Perioperative FOLFOX4 consisted of six 14-day cycles of oxaliplatin 85mg/m ( 2 ) , folinic acid 200 mg/m ( 2 ) ( DL form ) or 100 mg/m ( 2 ) ( L form ) on days 1-2 plus bolus , and fluorouracil 400 mg/m ( 2 ) ( bolus ) and 600 mg/m ( 2 ) ( continuous 22 h infusion ) , before and after surgery .\