title: Letter by Williams et al regarding article, "Bundle-branch block morphology and other predictors of outcome after cardiac resynchronization therapy in medicare patients".
authors.forename: Lynne
authors.initials: L
authors.lastname: Williams
authors.forename: Roger
authors.initials: R
authors.lastname: Beadle
authors.forename: Michael
authors.initials: M
authors.lastname: Frenneaux
mesh_terms: D002037:Bundle-Branch Block / Q000401:mortality*; D017147:Defibrillators, Implantable; D006801:Humans; D008297:Male; D012042:Registries