title: Some methodologic issues in validation of prognostic models.
authors.forename: Michael T
authors.initials: MT
authors.lastname: Koller
authors.forename: Ewout W
authors.initials: EW
authors.lastname: Steyerberg
mesh_terms: D002303:Cardiac Output, Low / Q000503:physiopathology*; D002908:Chronic Disease; D006801:Humans; D015233:Models, Statistical; D011379:Prognosis; D015203:Reproducibility of Results