[1] Karolinska Inst, Dept Publ Hlth Sci, Sect Epidemiol & Publ Hlth Intervent Res EPHIR, SE-17176 Stockholm, Sweden
[2] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[3] Karolinska Inst, Unit Occupat Med, Inst Environm Med, SE-17176 Stockholm, Sweden
[4] McLean Hosp, Biol Psychiat Lab, Belmont, MA 02178 USA
[5] Harvard Univ, Sch Med, Dept Psychiat, Boston, MA 02115 USA