title: [Mechanical heart valves or bioprostheses. A 12-year comparison].
authors.forename: K
authors.initials: K
authors.lastname: Hellberg
mesh_terms: D001021:Aortic Valve; D001705:Bioprosthesis / Q000706:statistics & numerical data; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000706:statistics & numerical data; D006801:Humans; D008943:Mitral Valve; D013997:Time Factors
vernacular_title: Mechanische Herzklappen oder Bioprothesen. Ein 12-Jahres-Vergleich.