1 Department of Cardiology, Heart Valve Clinic, University of Liège Hospital, GIGA Cardiovascular Sciences, CHU Sart Tilman, Avenue de l'hôpital, n1, 4000 Liège, Belgium.
2 Gruppo Villa Maria Care and Research, Anthea Hospital, Bari, Italy.
3 King's Health Partners, King's College Hospital NHS Foundation Trust, London, UK.