1. Department of Health Sciences, Public University of Navarra, Campus de Arrosadia, Pamplona, Spain
2. Spanish Society of Geriatrics and Gerontology, Madrid, Spain
3. Research group on Methodology, Methods, Models and Outcomes of Health and Social Sciences (M3O), Faculty of Health Sciences and Welfare. Center for Health and Social Care Research (CESS), University of Vic-Central University of Catalonia (UVIC-UCC), Victoria, Spain
4. Institute for Research and Innovation in Life Sciences and Health in Central Catalonia (IRIS-CC), Victoria, Spain