title: Not if, but when.
authors.forename: Thoralf M
authors.initials: TM
authors.lastname: Sundt
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000601:surgery*; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans