6Zagar SA, Javid G, Khan BA, et al. Endoscopic ligation compared with sclerotherapy for bleeding esophageal varices in children with extrahepatic portal venous obstruction. Hepatology ,2002,36:666-672.
7刘浔阳.食管胃静脉曲张的内镜治疗.北京:人民卫生出版社,2000.117-118.
8Sugano S,Yamamoto K,Takamura N,et al. Azygos venous blood flow while fasting, postprandially, and after endoscopic variceal ligation,measured by magnetic resonance imaging. J Gastroenterol, 1999,34:310-314.