1. University Clinic for Acute Geriatric Care, City Hospital Waid Zurich, Zurich 8037, Switzerland
2. Care of Older People, Room 4113 Medical School, Royal Derby Hospital, University of Nottingham, Uttoxeter Road, Derby, DE22 3DT, UK
3. Building Community Resilience and Enabling Independence (BCREI), NIHR Applied Research Collaboration-East Midlands (ARC-EM), Nottingham, UK