title: Invited commentary.
authors.affiliation: Toronto General Hospital, Toronto, Ontario, M5G 2C4, Canada. tirone.david@uhn.on.ca
authors.forename: Tirone E
authors.initials: TE
authors.lastname: David
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D006348:Cardiac Surgical Procedures / Q000379:methods*; D006349:Heart Valve Diseases / Q000601:surgery*; D006801:Humans; D012086:Reoperation; D014184:Transplantation, Homologous; D016896:Treatment Outcome