title: Editorial: An 'actual' problem: Another issue of apples and oranges.
authors.forename: Endre
authors.initials: E
authors.lastname: Bodnar
authors.forename: Eugene H
authors.initials: EH
authors.lastname: Blackstone
mesh_terms: D000206:Actuarial Analysis; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D011475:Prosthesis Failure; D012306:Risk; D016019:Survival Analysis; D009626:Terminology as Topic