1. Cardiology Department, University Hospital Ramon y Cajal, Madrid, Spain;
2. Cardiology Department, University Hospital La Paz, Madrid, Spain;
3. Medical Biostatistics, Universidad Católica San Antonio de Murcia, Murcia, Spain;
4. Jazmin Primary Care Health Center, East Area Primary Care, Madrid, Spain;
5. High Resolution Hospitalization Unit, Hospital el Toyo, Hospital de Poniente El Ejido, Almeria, Spain;
6. Primary Care Health Center Casar de Cáceres, Cáceres, Spain;
7. Medical Department, Bayer Hispania, Barcelona, Spain