Comparison of endoscopic ligation with sclerotherapy for preventing cirrhosis esophageal varices bleeding：a Meta analysis
CHEN Mingkai, HE Qianyu, DING Baijing, LIU Yunyan
Journal of Capital Medical University . 2013, (5): 673 -678 .  DOI: 10.3969/j.issn.1006-7795.2013.05.008