1. Institute of Clinical Medicine, Department of General Practice, University of Turku and Turku University Hospital, Turku, Finland
2. Päijät-Häme Central Hospital, Lahti, Finland
3. Department of Public Health, University of Turku and Turku University Hospital, Turku, Finland
4. Turku Clinical Research Centre, Turku, Finland
5. West Pori Health Center, Pori, Finland