Servicio de Geriatría, Hospital Universitario de Getafe, Madrid, Spain. Foundation for Biomedical Research-Hospital Universitario de Getafe, Madrid, Spain. Centre Hospitalier Universitaire de Toulouse, Toulouse, France. University of Campania-Luigi Vanvitelli, Naples, Italy. First Faculty of Medicine, Charles University, Prague, Czech Republic. University Castilla La Mancha University, Toledo, Spain. Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France. IdiSNA, Navarra Institute for Health Research, Public University of Navarra, Pamplona, Spain. Centre for Trials Research, Cardiff University, Cardiff, UK. Ulm University, Ulm, Germany. Università Cattolica Sacro Cuore, Rome, Italy. Department of Geriatrics, Ghent University Hospital, Ghent, Belgium. Niche Science & Technology Ltd, Richmond, UK. Department of Mathematics, University of Exeter, Exeter, UK. Gerontology Department, Vrije Universiteit Brussel, Brussels, Belgium. Foundation for Diabetes Research in Older People, Diabetes Frail Ltd, Luton, UK.