title: Letter by Charitos et al regarding article, "Reoperation of left heart valve bioprostheses according to age at implantation".
authors.forename: Efstratios I
authors.initials: EI
authors.lastname: Charitos
authors.forename: Ulrich
authors.initials: U
authors.lastname: Stierle
authors.forename: Hans-Hinrich
authors.initials: HH
authors.lastname: Sievers
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis; D006349:Heart Valve Diseases / Q000601:surgery*; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000706:statistics & numerical data*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery*