1. Division of Adult Congenital Heart Disease, Department of Cardiovascular Medicine, University Hospital Centre Zagreb, Kispaticeva ul. 12, Zagreb 10000, Croatia
2. Department of Medical Rehabilitation, Medical Faculty, University of Rijeka, Ul. Braće Branchetta 20/1, Rijeka 51000, Croatia
3. Adult Congenital Heart Centre and National Centre for Pulmonary Hypertension, Royal Brompton & Harefield Hospitals, Guys and St Thomas’ NHS Trust and Imperial College, Sydney Street, London SW3 6NP, UK
4. Department of Cardiology III: Adult Congenital and Valvular Heart Disease, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster 48149, Germany
5. Adult Congenital Heart Program, Erasmus University, PO Box 2040, Rotterdam 3000 CA, the Netherlands