1Thomson O' Brlen MA, Freemantle N, Oxman AD, et aL Continuing education meetings and workshops: effects on professional practice and healthcare outcomes. Cochrane library 2001:2.
2Heslin M J,Latkany L,Leung D,et al.A prospective, randomized trial of early enteral feeding after resection of upper gastrointestinal malignancy[].Annals of Surgery.1997