1. Cardiology Service; Hospital Santa Creu i Sant Pau-ICCC; Barcelona Spain
2. Cardiology Service, Hospital de Valme; Seville Spain
3. Epidemiology Service, Hospital Santa Creu i Sant Pau; Barcelona Spain
4. Cardiology Service, Hospital Son Dureta; Palma de Mallorca Spain
5. Cardiology Service, Hospital Joan XXIII; Tarragona Spain
6. Cardiology Service, Hospital Virgen Arrixaca; Murcia Spain
7. Biochemistry Service, Hospital Santa Creu i Sant Pau; Barcelona Spain
8. Cardiology Service; Hospital Universitario Santiago de Compostela; Spain
9. Cardiology Service; Hospital Gregorio Marañon; Madrid Spain
10. Cardiology Service; Hospital Insular, Las Palmas de Gran Canaria; Spain
11. Cardiology Service; Hospital Clínico; Madrid Spain