1 Department of Cardiology, University of Liège Hospital, GIGA Cardiovascular Sciences, CHU Sart Tilman, Domaine Universitaire du Sart Tilman - B.35, 4000 Liège, Belgium.
2 Gruppo Villa Maria Care and Research, Maria Cecilia Hospital, Cotignola, and Anthea Hospital, Via C. Rosalba, 35/37 - 70124 Bari, Italy.
3 National Heart Research Institute Singapore, National Heart Centre Singapore, 5 Hospital Drive, Singapore 169609, Singapore.
4 Piedmont Heart Institute, Marcus Heart Valve Center, 95 Collier Road, Atlanta, GA 30305, USA.