4Neubaus H, Hoffmann W, Dittler JH, et al. Implantation of self- expanding esophageal metal stents for palliation of malignant dysphagia [J]. Endoscopy, 1992,24: 405. 被引量:1
5Lelah, M D, Cooper, SL. Polyurethanes in Medicine. Boca Raton, FL; CRC Press, 1986,57. 被引量:1