1. Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain
2. Hospital Universitario La Paz, Madrid, Spain
3. Hospital Universitario Vall d’Hebrón, Barcelona, Spain
4. Hospital de Mataró, Mataró, Spain
5. Hospital Xeral-Cies, Vigo, Spain
6. Hospital Universitario Reina Sofia, Córdoba, Spain
7. Department of Medicine, Sanofi-Synthelabo, Barcelona, Spain
8. Pharma Consult Services, Pharma Research, Barcelona, Spain