| http://www.w3.org/ns/prov#value | - A method for delivering a prosthesis into the esophagus of a patient, comprising:providing an elongated catheter with a shaft defining an axis and having a proximal end that remains outside the body, a distal end, and a supporting portion for supporting a prosthesis configured in a radially compact form, said catheter further including a bi-directional dilating tip fixed to said catheter at a poin
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