title: Erratum to: Echocardiography and cardiac resynchronization therapy, friends or foes?
authors.affiliation: Department of Cardiology, University Medical Centre Utrecht, Heidelberglaan 100, 3508 GA, PO Box 85500, Utrecht, The Netherlands. w.m.vaneverdingen@umcutrecht.nl.
authors.forename: W M
authors.initials: WM
authors.lastname: van Everdingen
authors.affiliation: Department of Cardiology, University Medical Centre Utrecht, Heidelberglaan 100, 3508 GA, PO Box 85500, Utrecht, The Netherlands.
authors.forename: J C
authors.initials: JC
authors.lastname: Schipper
authors.affiliation: Department of Cardiology, University Medical Centre Utrecht, Heidelberglaan 100, 3508 GA, PO Box 85500, Utrecht, The Netherlands.
authors.forename: J
authors.initials: J
authors.lastname: van 't Sant
authors.affiliation: Department of Cardiology, University Medical Centre Utrecht, Heidelberglaan 100, 3508 GA, PO Box 85500, Utrecht, The Netherlands.
authors.forename: K Ramdat
authors.initials: KR
authors.lastname: Misier
authors.affiliation: Department of Cardiology, University Medical Centre Utrecht, Heidelberglaan 100, 3508 GA, PO Box 85500, Utrecht, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Meine
authors.affiliation: Department of Cardiology, University Medical Centre Utrecht, Heidelberglaan 100, 3508 GA, PO Box 85500, Utrecht, The Netherlands.
authors.forename: M J
authors.initials: MJ
authors.lastname: Cramer