[1] Univ Jyvaskyla, Dept Hlth Sci, FI-40014 Jyvaskyla, Finland
[2] Cent Finland Hlth Care Dist, Dept Phys & Rehabil Med, FI-40620 Jyvaskyla, Finland
[3] Cent Finland Hlth Care Dist, Unit Gen Practice, FI-40620 Jyvaskyla, Finland
[4] ORTON Rehabil Unit, FI-00281 Helsinki, Finland
[5] Univ Eastern Finland, Dept Psychiat, FI-70210 Kuopio, Finland
[6] Kuopio Univ Hosp, FI-70210 Kuopio, Finland
[7] Natl Inst Hlth & Welf, FI-00271 Helsinki, Finland
[8] Univ Eastern Finland, Dept Primary Healthcare, FI-70211 Kuopio, Finland
[9] Kuopio Univ Hosp, Unit Family Practice, FI-70211 Kuopio, Finland
[10] Tampere Univ Hosp, FI-33521 Tampere, Finland
[11] Univ Tampere, Dept Psychiat, Seinajoki Hosp Dist, FI-33014 Tampere, Finland
[12] Univ Tampere, Sch Med, FI-33014 Tampere, Finland