Those which do have normally studied metallic prostheses 3, 14, 18, have evaluated both malignant and benign stenoses 16, and have studied stents which were placed both endoscopically and percutaneously 18.
Los que lo hacen generalmente usan prótesis metálicas 3, 14, 18 las evalúan en estenosis tanto benignas como malignas 16o las colocan endoscópica o percutáneamente 18.