WANG Wei, SHI Xin, CHEN Hu, MIAO Fulong, QIN Qiyu, CHEN Jinjun. Effect of ursodeoxycholic acid combined with gallbladder protected lithotomy on postoperative bile composition and expression of Calponin and VIP in biliary smooth muscles[J]. Journal of Hebei Medical University, doi: 10.3969/j.issn.10073205.2016.09.006.