title: Invited commentary.
authors.affiliation: Research Department, University Hospital of Schleswig-Holstein, Campus Kiel, Arnold-Heller-Str. 7, Kiel D-24105, Germany. lutter@kielheart.uni-kiel.de
authors.forename: Georg
authors.initials: G
authors.lastname: Lutter
mesh_terms: D001021:Aortic Valve / Q000601:surgery; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D015626:Tissue Expansion / Q000379:methods*