1. Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
2. Cardiology Department, IIS-Fundación Jiménez Díaz University Hospital, Madrid, Spain
3. CIBERCV, Madrid, Spain
4. Cardiology Department, Prof. Dr. Fernando Fonseca Hospital, Amadora, Portugal
5. Department of Cardiology and Department of Adult Critical Care, Royal Brompton Hospital, London, UK