1. Department of Family Medicine; University of Turku; Turku Finland
2. Department of Neurology; University of Turku, and Division of Clinical Neurosciences, Turku University Hospital; Turku Finland
3. Pori City Health Centre; Pori Finland
4. Department of Biostatistics; University of Turku; Turku Finland
5. Collage of Public Affairs; University of Baltimore; Baltimore USA
6. Division of Social Pharmacy; University of Helsinki; Helsinki Finland
7. Härkätie Health Centre; Lieto Finland
8. Department of Clinical Pharmacology; University of Helsinki, and HUSLAB, Helsinki University Central Hospital; Helsinki Finland
9. Helsinki Sleep Clinic; Vitalmed Research Center; Helsinki Finland
10. Department of Neurology; University of Helsinki; Helsinki Finland
11. Turku City Hospital; Turku Finland
12. Satakunta Central Hospital; Pori Finland