| http://www.w3.org/ns/prov#value | - nthesized in tubular form) as the starting material, to increase the long-term durability of replacement heart valves. [0074] Another object of this invention is to provide a method of using tubular starting material to create a replacement heart valve without requiring the use of a foreign object such as a stent to secure the replacement valve in position. [0075] Another object of this invention
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