title: Early failure of freehand aortic stentless xenograft valves.
authors.affiliation: Division of Cardiac Surgery, University of Verona, Italy.
authors.forename: G B
authors.initials: GB
authors.lastname: Luciani
authors.forename: P
authors.initials: P
authors.lastname: Bertolini
authors.forename: A
authors.initials: A
authors.lastname: Mazzucco
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000601:surgery*; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D014183:Transplantation, Heterologous