title: Limitations of subgroup analyses in meta-analysis of cardiac resynchronization therapy by QRS duration.
authors.forename: Charles D
authors.initials: CD
authors.lastname: Magee
authors.forename: Lynn Anne
authors.initials: LA
authors.lastname: Byars
authors.forename: Kent J
authors.initials: KJ
authors.lastname: DeZee
mesh_terms: D058406:Cardiac Resynchronization Therapy / Q000706:statistics & numerical data*; D004562:Electrocardiography; D005260:Female; D006333:Heart Failure / Q000503:physiopathology* / Q000628:therapy*; D006801:Humans; D008297:Male