1. Adult Congenital Heart Centre, Centre for Pulmonary Hypertension, Royal Brompton Hospital, Sydney St, Chelsea London, UK
2. National Heart and Lung Institute, Imperial College, Kensington London, UK
3. Division of Adult Congenital and Valvular Heart Disease, Department of Cardiovascular Medicine, University Hospital Muenster, Albert-Schweitzer-Straße 33, Münster, Germany
4. Division of Valvular Heart Disease and Adult Congenital Heart Disease, Department of Cardiovascular Medicine, University Hospital Centre Zagreb, Kispaticeva 12, Zagreb, Croatia