1. Geriatric Department, Complejo Hospitalario de Navarra, Pamplona, Navarra, Spain
2. Biomedical Research Centre of the Government of Navarre (Navarrabiomed) and Navarra Institute for Health Research, Pamplona, Navarra, Spain
3. Biomedical Research Networking Centers of Frailty and Healthy Aging, Instituto de Salud Carlos III, Madrid, Spain
4. Department of Health Sciences, Public University of Navarra, Pamplona, Navarra, Spain
5. Faculty of Sports Sciences, Universidad Europea de Madrid, Madrid, Spain
6. Research Institute of the Hospital 12 de Octubre (“i+12”), Madrid, Spain
7. Geriatric Department, Hospital Universitario de Getafe, Getafe, Madrid, Spain