1. Adult Congenital Heart Centre and National Centre for Pulmonary Hypertension, Royal Brompton Hospital, London, UK
2. National Heart and Lung Institute, Imperial College, London, UK
3. Integrated Adult Congenital Heart Disease Unit of Vall d'Hebron University Hospital and Santa Creu i Sant Pau University Hospital, Barcelona, Spain
4. Adult Congenital Heart Program, Erasmus University, Rotterdam, The Netherlands
5. Department of Cardiology, University Hospitals, Leuven, Belgium
6. Division of Adult Congenital Heart Disease, Department of Cardiovascular Medicine, University Hospital Centre Zagreb, Croatia