title: Reviewer's response.
authors.forename: Niels
authors.initials: N
authors.lastname: Risum
mesh_terms: D002037:Bundle-Branch Block / Q000175:diagnosis* / Q000628:therapy*; D058406:Cardiac Resynchronization Therapy / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis* / Q000628:therapy*