[1] Univ Helsinki, Inst Mol Med, Helsinki, Finland
[2] Broad Inst MIT & Harvard, Massachusetts Gen Hosp, Stanley Ctr Psychiat Genet, Cambridge, MA 02142 USA
[3] Univ Oulu, Oulu Univ Hosp, Med Res Ctr, Oulu, Finland
[4] Northern Ostrobothnia Hosp Dis, Ctr Intellectual Disabil Care, Oulu, Finland
[5] Univ Oulu, Med Res Ctr, Oulu Univ Hosp, Oulu, Finland
[6] Broad Inst MIT & Harvard, Stanley Ctr Psychiat Res, Cambridge, MA USA
[7] Univ Helsinki, HiLIFE Neurosci Ctr, Helsinki, Finland