Clinical effects of probiotics combined with bismuth quadruple therapy for Helicobacter pylori infected patients Journal title: Shanghai Journal of Preventive Medicine Authors: GUI Min,GU Qiuyun,HU Yusen,YAN Chenyuan,SHAO Ying,XIA Lina,HE Jieyi,WU Peiying,HONG Yiming,DU Qiuju, Subject(s): Public Health and Community Medicine, Public, Environmental & Occupational Health