1. Consultant in Geriatric Medicine, Mater Private Network, Cork, Ireland
2. Servicio de Geriatría, Hospital Universitario Ramón y Cajal (IRYCIS), Madrid, Spain
3. Universidade Católica Portuguesa, Faculty of Medicine and Centre for Interdisciplinary Research in Health, Centre for Interdisciplinary Research Egas Moniz (CiiEM), Lisbon, Portugal
4. Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, Helsinki, Finland