1. School of Nursing Science; Witten/Herdecke University; Germany
2. School CAPHRI; Maastricht University; The Netherlands
3. Department of Nursing Science; University of Turku; Finland
4. Geriatrics Department; Gérontopôle, Toulouse University Hospital; France
5. Personal Social Services Research Unit; University of Manchester; UK
6. Department of Nursing Science; Lund University; Sweden
7. Nursing Department; Hospital Clínic de Barcelona; Spain
8. Department of Internal Medicine; University of Tartu; Estonia