1. Adult Congenital Heart Centre, National Centre for Pulmonary Hypertension, Royal Brompton Hospital, Sydney Street, London, UK
2. National Heart and Lung Institute, Imperial College School of Medicine, Dovehouse Street, London, UK
3. Department of Cardiology III – Adult Congenital and Valvular Heart Disease, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany
4. Competence Network for Congenital Heart Defects, DZHK (German Centre for Cardiovascular Research), Augustenburger Platz 1, Berlin, Germany
5. Division of Valvular Heart Disease and Adult Congenital Heart Disease, Department of Cardiovascular Medicine, University Hospital Centre Zagreb, Kispaticeva 12, Zagreb, Croatia
6. Division of Paediatric Cardiology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Muenster, Germany