| http://www.w3.org/ns/prov#value | - A novel tubular prosthesis has now been invented which comprises a sheet of pericardial tissue having opposed edges sewn together by means including a thread to form a longitudinal seam, with the thread being disposed in a configuration including a plurality of stitches extending along the seam, wherein the configuration of the thread is such that the prosthesis can be cut transversely between its
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