1. Division of cardiology; Centre Hospitalier Universitaire De Charleroi; Charleroi Belgium
2. Division of cardiology; AHEPA University Hospital; Thessaloniki Greece
3. Division of Congenital and Structural Cardiology; University Hospital of Leuven; Leuven Belgium
4. Division of cardiology; Jessaziekenhuis; Hasselt Belgium
5. Division of cardiology; Cliniques Universitaires Saint-Luc; Brussels Belgium