3Loperfido S,Monica F,Maifreni L,et al.Bleeding peptic ulcer occurring in hospitalized patients:analysis of predictive and risk factors and comparison with out of hospital onset of hemorrhage[J].Dig Dis Sci,1994,39:698-705.
4Borum ML,Lnm J,Zhong Z,et al.The effect of nutritional supplementation on survival in Survival in seriously ill hospitalized adults:an evaluation of SUPPORT data.Study to Understand Prognoses and Preferences for Outcomes and Risks of Treatments[J].J Am Gefiatr soc,2000,48(5Suppl):S33-S38.