Keywords cost-efficiency analysis;ulceration of duodenal ampulla;capsule of bismuth potassium citrate and ranitidine;capsule of omeprazole;capsule of rabeprazole;

• 成本-效果分析;十二指肠球部溃疡;枸橼酸铋钾雷尼替丁胶囊;奥美拉唑胶囊;雷贝拉唑胶囊;