title: Validity and selection.
authors.affiliation: Department of Biostatistics, Institute of Basic Medical Sciences, Oslo Centre for Biostatistics and Epidemiology, University of Oslo , Norway.
authors.forename: Dag Steinar
authors.initials: DS
authors.lastname: Thelle
mesh_terms: D001281:Atrial Fibrillation / Q000401:mortality*; D006333:Heart Failure / Q000401:mortality*; D006801:Humans