COMBINED STRATEGY OF PREOPERATIVE RADIOCHEMOTHERAPY (50 GY + CAPECITABINE plus OXALIPLATIN plus CETUXIMAB), SURGERY, AND POSTOPERATIVE CHEMOTHERAPY (FOLFOX4+CETUXIMAB) IN LOCALLY ADVANCED RECTAL CANCER WITH SYNCHRONOUS RESECTABLE METASTASES: INTERIM RESULTS OF THE FRENCH MULTICENTRIC PHASE II TRIAL (ACCORD 14/0604)