1 National Heart Research Institute Singapore, National Heart Centre Singapore, Singapore; University of Liège Hospital, Heart Valve Clinic, Department of Cardiology, University Hospital Sart Tilman, Liège, Belgium.
2 University of Liège Hospital, Heart Valve Clinic, Department of Cardiology, University Hospital Sart Tilman, Liège, Belgium; GIGA Cardiovascular Sciences, University Hospital Sart Tilman, Liège, Belgium; Gruppo Villa Maria Care and Research, Anthea Hospital, Bari, Italy. Electronic address: plancellotti@chu.ulg.ac.be.