4British Society of Gastroenterology Endoscopy Committee. Non - variceal upper gastrointestinal haemorrhage :guidelines [ J ]. Gut, 2012,51(4) :1 -6.
5Biondi - Zoccai GG, Lotrionte M, Agostoni P, et al. Asystematic review and meta - analysis on the hazards of discontinuing or not adhering to aspirin among 50,279patients at risk for coronar- yartery disease [ J ]. Eur Heart,2011,27 ( 22 ) : 2667 ~ 2674.