1. Department of Cardiology; Hospital Universitario A Coruña; A Coruña; Spain
2. Department of Cardiology; Hospital Santa Cruz y San Pablo; Barcelona; Spain
3. Department of Cardiology; Clínica Puerta de Hierro de Majadahonda; Madrid; Spain
4. Department of Cardiology (Adults); Hospital Gregorio Marañón; Madrid; Spain
5. Department of Cardiology; Hospital 12 de Octubre; Madrid; Spain
6. Department of Cardiology; Hospital Marqués de Valdecilla; Santander; Spain
7. Department of Cardiology; Hospital de Bellvitge; Barcelona; Spain
8. Department of Cardiology; Hospital Virgen del Rocío; Sevilla; Spain
9. Department of Pediatric Cardiology; Hospital La Paz; Madrid; Spain
10. Department of Cardiology; Hospital Universitario Central de Asturias; Oviedo; Spain
11. Department of Pediatric Cardiology; Hospital Vall d'Hebron; Barcelona; Spain