1 Department of Cardiology, Thorax Centrum Twente, Medisch Spectrum Twente, 7500 KA, Enschede, Netherlands; Department of Health Technology and Services Research (Faculty of Behavioural, Management and Social Sciences), Technical Medical Centre, University of Twente, Enschede, Netherlands. Electronic address: c.vonbirgelen@mst.nl.
2 Department of Cardiology, Thorax Centrum Twente, Medisch Spectrum Twente, 7500 KA, Enschede, Netherlands.