7Zeuhaus H ,Hoffmann W,Dittler HJ,et al.Impantation of self-expanding esophaged metalstents for palliation of malignant dysphagia[J].Endoscopy,1992,24:405.
8ELL C,May A.Self-expanding metal stents for palliation of stenosing tumors of the esophagas and cardia:a critical review[J].Endoscopy,1997,29:392-397.
9Law S,TungP,K-Man C,et al.Self-expanding metallic stents for palliation of recurrentmalignant esophageal obstruction after subtotal esophagectomy for cancer[J].Gastrointest Endosc,1999,50(1):427-431.