RESULTS	Postoperative length of hospital stay was ( 9.8 + / -3.4 ) d in enteral nutrition group , ( 11.2 + / -5.0 ) d in parenteral nutrition group , and ( 14.5 + / -7.1 ) d in conventional group ( P = 0.001 vs enteral nutrition group ; P = 0.003 vs parenteral nutrition group ) .\