title: Invited Commentary.
authors.affiliation: Department of Cardiovascular Surgery, Toronto General Hospital, 200 Elizabeth St, 4N453, Toronto, Ontario M5G 2C4, Canada. Electronic address: tirone.david@uhn.ca.
authors.forename: Tirone E
authors.initials: TE
authors.lastname: David
mesh_terms: D001024:Aortic Valve Stenosis / Q000601:surgery*; D001705:Bioprosthesis; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male