title: Procedure volume and outcome: you should take into account each hospital.
authors.forename: Eliano Pio
authors.initials: EP
authors.lastname: Navarese
authors.forename: Fausto
authors.initials: F
authors.lastname: Castriota
authors.forename: Stefano
authors.initials: S
authors.lastname: De Servi
mesh_terms: D013504:Cardiovascular Surgical Procedures / Q000379:methods / Q000639:trends*; D017052:Hospital Mortality / Q000639:trends*; D006801:Humans; D016896:Treatment Outcome; D016526:Workload