1. Amsterdam UMC, University of Amsterdam, Heart Center; Department of Clinical and Experimental CardiologyAmsterdam Cardiovascular Sciences, Meibergdreef 9 Amsterdam The Netherlands
2. Craigavon Cardiac Centre Craigavon United Kingdom
3. Radboud University Medical Center Nijmegen The Netherlands
4. Amphia Hospital Breda Breda The Netherlands
5. Hospital Álvaro CunqueiroComplejo Hospitalario Universitario Vigo Spain
6. Isala Klinieken Zwolle The Netherlands
7. Pauls Stradins Clinical University Hospital Riga Latvia
8. Tergooi Ziekenhuis Blaricum The Netherlands
9. Institut National de Cardiochirurgie et de Cardiologie Interventionnelle Luxembourg The Netherlands