A randomized , phase @ trial evaluated preoperative RT ( @ Gy in @-Gy fractions ) with @ concurrent chemotherapy regimens : ( @ ) capecitabine ( @ mg/m ( @ ) / d Monday-Friday ) plus irinotecan ( @ mg/m ( @ ) / wk @ ) ; and ( @ ) capecitabine ( @ mg/m ( @ ) / d Monday-Friday ) plus oxaliplatin ( @ mg/m ( @ ) / wk @ ) for clinical T@ or T@ rectal cancer .