1. Adult Congenital Heart Centre and Centre for Pulmonary Hypertension, Cardiology Department, Royal Brompton Hospital Guy’s and St Thomas’ NHS Foundation Trust London United Kingdom
2. Department of Medicine Autonomous University of Barcelona Barcelona Spain
3. Cardiology Department University Hospital La Paz Madrid Spain
4. National Heart and Lung Institute Imperial College London London United Kingdom
5. Cardiology Department University Hospital 12 de Octubre Madrid Spain
6. Cardiothoracic and Congenital Heart Surgery, The Royal Brompton Hospital Guy’s and St Thomas’ NHS Foundation Trust London United Kingdom
7. Cardiology Department University Hospital Parc Tauli Sabadell Spain