1. Internal Medicine Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clinico San Carlos (IdISSC), Universidad Complutense, 28040 Madrid, Spain
2. Internal Medicine Department, Hôpitaux Universitaires de Strasbourg, 67000 Strasbourg, France
3. Internal Medicine Department, Hospital Universitario Central de Asturias, 33011 Oviedo, Spain
4. Internal Medicine Department, Hospital Universitario Ramón y Cajal, Instituto Ramon y Cajal de Investigación Sanitaria (IRYCIS), Universidad de Alcala de Henares, 28034 Madrid, Spain
5. Internal Medicine Department, Hospital Universitario de Getafe, 28905 Madrid, Spain
6. Internal Medicine Department, Hospital Universitario Lucus Augusti, 27003 Lugo, Spain
7. Internal Medicine Department, Consorcio Hospital General Universitario de Valencia, 46014 Valencia, Spain
8. Internal Medicine Department, Hospital Universitario de Badajoz, 06080 Badajoz, Spain
9. Internal Medicine Department, Hospital Universitario de Gran Canaria Dr. Negrín, 35010 Gran Canaria, Spain
10. Internal Medicine Department, Hospital Universitario Nuestra Señora de la Candelaria, 38010 Tenerife, Spain
11. Internal Medicine Department, Complejo Hospitalario de Soria, 42005 Soria, Spain
12. Internal Medicine Department Hospital Universitario Reina Sofía, Instituto de Investigación Biomédica de Cordoba (IMIBIC), 14004 Cordoba, Spain