title: Invited commentary.
authors.affiliation: Department of Cardiothoracic Surgery, Stanford University Medical Center, Falk Cardiovascular Research Center, 300 Pasteur Dr, Stanford, CA 94305-5247, USA. jfann@stanford.edu
authors.forename: James I
authors.initials: JI
authors.lastname: Fann
mesh_terms: D000818:Animals; D001011:Aorta / Q000473:pathology / Q000601:surgery*; D001021:Aortic Valve / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans; D012756:Sheep