Department of Cardiology, Thoraxcentrum Twente, Medisch Spectrum Twente, Enschede, the Netherlands; Department of Health Technology and Services Research, Faculty BMS, Technical Medical Centre, University of Twente, Enschede, the Netherlands. Department of Health Technology and Services Research, Faculty BMS, Technical Medical Centre, University of Twente, Enschede, the Netherlands. Department of Cardiology, Rijnstate Hospital, Arnhem, the Netherlands. Department of Cardiology, Haga Hospital, The Hague, the Netherlands. Department of Cardiology, Albert Schweitzer Hospital, Dordrecht, the Netherlands. Department of Cardiology, Thoraxcentrum Twente, Medisch Spectrum Twente, Enschede, the Netherlands. Department of Cardiology, Hospital Group Twente, Almelo and Hengelo, the Netherlands. Department of Cardiology, Thoraxcentrum Twente, Medisch Spectrum Twente, Enschede, the Netherlands; Department of Health Technology and Services Research, Faculty BMS, Technical Medical Centre, University of Twente, Enschede, the Netherlands. Electronic address: c.vonbirgelen@mst.nl.