[1] Karolinska Inst, Div Psychol, Dept Clin Neurosci, Stockholm, Sweden
[2] Karolinska Inst, Dept Publ Hlth Sci, Epidemiol Mental Hlth Div, Stockholm, Sweden
[3] Uppsala Univ, Dept Neurosci, Uppsala, Sweden
[4] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden
[5] Linkoping Univ, Dept Behav Sci & Learning, Linkoping, Sweden
[6] Karolinska Inst, Dept Clin Neurosci, Ctr Psychiat Res, Stockholm, Sweden
[7] Harvard Med Sch, McLean Hosp, Boston, MA 02115 USA
[8] Harvard Med Sch, Dept Psychiat, Boston, MA 02115 USA