8Frimberger E. Expanding spiral:A new type of prosthesis for the palliative treatment o{ malignant esophageal stenoses[J]. Endosco- py, 1983,15(Suppl 1) :213 - 214.
9Song HY, Choi KC, Cho BH, et al. Esophagogastric neoplasms Palliation with a modi{ied gianturco stent[J]. Radiology, 1991 180:349 -354.