1. Geriatrics Department, Hospital San Juan de Dios, 50006 Zaragoza, Spain
2. Geriatrics Department, Universidad de Zaragoza, 50009 Zaragoza, Spain
3. Group B21-23R, Health Research Institute of Aragon (IISA), 50009 Zaragoza, Spain
4. Network for Research on Chronicity, Primary Care and Health Promotion (RICAPPS, RD21/0016/0005), 50015 Zaragoza, Spain
5. Department of Psychology and Sociology, University of Zaragoza, 50009 Zaragoza, Spain
6. Medicine Department, Universidad de Zaragoza, 50009 Zaragoza, Spain
7. Fundació Institut Universitari per a la Recerca a l’Atenció Primària de Salut Jordi Gol i Gurina, 08007 Barcelona, Spain
8. Pharmacology Department, Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), 08193 Bellaterra, Spain
9. CIBER en Enfermedades Infecciosas Instituto Carlos III, 28029 Madrid, Spain
10. Nursing Home, Aragon Institute of Social Services (IASS), 50540 Borja, Spain
11. Geriatrics Department, Hospital Universitario Ramón y Cajal (IRYCIS), 28034 Madrid, Spain
12. Internal Medicine Department, Hospital Universitario La Princesa, Instituto de Investigación Sanitaria (IIS-Princesa), 28006 Madrid, Spain
13. Research Institute of Princesa (IIS Princesa), 28006 Madrid, Spain
14. Pharmacology Department, Complejo Hospitalario Universitario de Canarias, 38320 Santa Cruz de Tenerife, Spain
15. Institut Català de la Salut, 08038 Barcelona, Spain
16. Research Unit for General Practice, Department of Public Health, University of Southern Denmark, 5230 Odense, Denmark