title: Conflicting echocardiographic evaluations of supra-annular tissue valves: a mystery not yet resolved.
authors.forename: Tomaso
authors.initials: T
authors.lastname: Bottio
authors.forename: Gino
authors.initials: G
authors.lastname: Gerosa
mesh_terms: D001705:Bioprosthesis; D003326:Coronary Circulation; D004452:Echocardiography; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation; D006351:Heart Valves / Q000000981:diagnostic imaging*; D006801:Humans