| http://www.w3.org/ns/prov#value | - A method of making a heart valve prosthesis comprising:excising a plurality of leaflets from at least one heart valve, each said leaflet including a valve wall and a cusp, each leaflet valve wall having a pair of generally opposed side edges an inflow edge and an outflow edge, each said cusp attached to and extending from a respective said valve wall proximal said inflow edge; attaching each said
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