1. Cardiovascular Center Aalst OLV Clinic, Belgium (S.F., I.C., B.D.B., E.B.).
2. Lausanne University Center Hospital, Switzerland (S.F.).
3. Division of Cardiology, Department of Advanced Biomedical Sciences, University of Naples Federico II, Italy (S.F., E.B.).
4. Division of Cardiology, Medical University of Graz, Austria (G.G.T.).