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407-448 7) Akins CW:Results with mechanical cardiac valvular prostheses. Ann Thorac Surg 60:1836-1844, 1995 8) Frater RW, Furlong P, Cosgrove DM, et al.:Longterm durability and patient functional status of the Carpentier-Edwards Perimount pericardial bioprostheses in the aortic position.doi:10.11392/jsao1972.27.5_798 fatcat:zvcc2blj65e2vbzicgo7ydz6dm