1. Cardiology Department; University Hospital 12 de Octubre; Madrid Spain
2. Cardiology Department; University Hospital Araba-Txagorritxu; Vitoria-Gasteiz Alava Spain
3. Cardiology Department; University Hospital of Canarias; San Cristóbal de La Laguna Santa Cruz de Tenerife Spain
4. Cardiology Department; Hospital Virgen de la Victoria; Malaga Spain
5. Cardiology Department; University Hospital of Vigo; Vigo Spain
6. Cardiology Department; Hospital of Navarra; Pamplona Spain
7. Cardiology Department; Hospital Nuestra Señora de la Candelaria; Santa Cruz de Tenerife Spain
8. Cardiology Department; Hospital Infanta Cristina; Badajoz Spain
9. Cardiology Department; Hospital Santa Creu i Sant Pau; Barcelona Spain
10. Cardiology Department; Hospital Clinico San Carlos; Madrid Spain