1. Department of Clinical Epidemiology, Department of Clinical Medicine Aarhus University and Aarhus University Hospital Aarhus N Denmark
2. Department of Internal Medicine Viborg Regional Hospital Viborg Denmark
3. Danish Center for Clinical Health Services Research, Department of Clinical Medicine Aalborg University Aalborg Ø Denmark
4. Department of Geriatrics Aarhus University Hospital Aarhus N Denmark
5. Department of Neurology Aarhus University Hospital Aarhus N Denmark