Efficacy and safety of endoscopic retrograde cholangiopancreatography combined with oral cholangiopancreatography in the treatment of duodenal papilla cholecystectomy Journal title: Journal of Clinical Hepatology Authors: Liying TAO, Hongguang WANG, Qingmei GUO, Xiang GUO, Lianyu PIAO, Muyu YANG, Yong YU, Libin RUAN, Jia... Subject(s): Medicine