1. Department of Geriatric Medicine; Odense University Hospital; Odense Denmark
2. Geriatric Research Unit, Department of Clinical Research; University of Southern Denmark; Odense Denmark
3. The Research Unit for General Practice and Section of General Practice, Department of Public Health; University of Copenhagen; Copenhagen Denmark
4. University Institute in Primary Care Research Jordi Gol; Via Roma Health Centre; Barcelona Spain
5. Research Unit of General Practice, Department of Public Health, General Practice; University of Southern Denmark; Odense Denmark
6. Department of Cross-sectoral Collaboration; Region of Southern Denmark; Vejle Denmark
7. Epidemiology, Biostatistics and Biodemography, Department of Public Health; University of Southern Denmark; Odense Denmark
8. The Research Unit for General Practice and Section of General Practice; Department of Public Health, University of Copenhagen; Copenhagen Denmark
9. Nordic Cochrane Centre; Rigshospitalet Dept 7112; Copenhagen Denmark