5Lewis SJ, Egger M, Sylvester PA, et al. Early enteral feeding versus "nil by mouth" after gastrointestinal surgery: systemat- ic review and Meta-analysis of controlled trials[J]. BMJ,2001, 323(7316) : 773-776.
6Hoon LS, Osman MSBM. Early enteral feeding in adult pa- tients after colorectal surgery[J]. The JBI Database of Sys- tematic Reviews and Implementation Reports, 2011,9 (48) : 1- 23.
8The Joanna Brigg Institute. Joanna Brigg Institute Reviewers: Manual. 2011 Edition[M]. Adelaide: Joanna Briggs Institute, 2011 : 151-152. [ 2015-04-04]. http://joannabriggs, org/as- sets/docs/sumari/ReviewersManual-2011, pdf.
9Centre for Evidence Based Medicine. Oxford Centre for Evi- dence-based Medicine-levels of evidence (March 2009) [ EB/ OL]. [2015-04-03]. http://www, cebm. net/oxford-centre- evidence-based-medieine-levels-evidence-march-2009.
10National Collaborating Centre for Acute Care (UK). Nutrition support for adults. Oral nutrition support, enteral tube feeding and parenteral nutrition. NICE Clinical Guidelines, No. 32 [M]. London: National Collaborating Centre for Acute Care (UK), 2006. [2015-03-13]. http://www, nebi. nlm. nih. gov/puhmedhealth/PMH0009180/.
