title: Retrospective studies of left atrial thrombus: does misclassification impair their clinical utility?
authors.forename: D J
authors.initials: DJ
authors.lastname: Ballard
mesh_terms: D006325:Heart Atria; D006331:Heart Diseases / Q000453:epidemiology*; D006801:Humans; D015995:Prevalence; D012107:Research Design; D012189:Retrospective Studies; D012307:Risk Factors; D013927:Thrombosis / Q000453:epidemiology*