title: Updating systematic reviews--when and how?
authors.forename: Peter
authors.initials: P
authors.lastname: Tugwell
authors.forename: Andre
authors.initials: A
authors.lastname: Knottnerus
authors.forename: Leanne
authors.initials: L
authors.lastname: Idzerda
mesh_terms: D002986:Clinical Trials as Topic; D057186:Comparative Effectiveness Research; D003627:Data Interpretation, Statistical; D006801:Humans; D015201:Meta-Analysis as Topic; D012196:Review Literature as Topic