title: To screen or not to screen: how to improve clinical trials.
authors.forename: P
authors.initials: P
authors.lastname: Held
authors.forename: K
authors.initials: K
authors.lastname: Swedberg
mesh_terms: D002318:Cardiovascular Diseases / Q000145:classification*; D002986:Clinical Trials as Topic / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D018579:Patient Selection; D015203:Reproducibility of Results; D012107:Research Design; D018570:Risk Assessment / Q000379:methods / Q000592:standards; D015983:Selection Bias