1. Department of Cardiology, Heart Center, Academic Medical Center—University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
2. Department of Cardiology, UZ Leuven, and Department of Cardiovascular Sciences, KU Leuven, Herestraat 49, B-3000 Leuven, Belgium
3. Department of Cardiology, Toronto General Hospital, Toronto Congenital Cardiac Centre for Adults, 200 Elizabeth Street, M5G 2C4, Toronto, Ontario, Canada
4. Netherlands Heart Institute, Moreelsepark 1, 3511 EP Utrecht, The Netherlands