[1] Finnish Inst Occupat Hlth, PL 18, Helsinki 00032, Finland
[2] Univ Eastern Finland, Inst Publ Hlth & Clin Nutr, Sch Med, Kuopio, Finland
[3] Univ Turku, Dept Publ Hlth, Turku, Finland
[4] Univ Turku, Ctr Populat Hlth Res, Turku, Finland
[5] Univ Helsinki, Clinicum, Helsinki, Finland
[6] UCL, UCL Brain Sci, London, England