title: First: patient safety, second: patient safety.
authors.forename: Piersandro
authors.initials: P
authors.lastname: Sette
authors.forename: Romolo M
authors.initials: RM
authors.lastname: Dorizzi
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: Azzini
mesh_terms: D002405:Catheterization, Central Venous / Q000295:instrumentation* / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D019919:Prosthesis Implantation / Q000379:methods*; D015641:Radiography, Interventional; D017751:Safety Management; D018084:Ultrasonography, Interventional