[1] Kings Coll London, Inst Psychiat, MRC Social Genet & Dev Psychiat Ctr, London, England
[2] South London & Maudsley NHS Fdn Trust, Natl & Specialist OCD & Related Disorders Clin Yo, London, England
[3] Karolinska Inst, Ctr Psychiat Res, Dept Clin Neurosci, Stockholm, Sweden
[4] Stockholm Cty Council, Stockholm Hlth Care Serv, Stockholm, Sweden
[5] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden
[6] Univ Gothenburg, Gillberg Neuropsychiat Ctr, Ctr Eth Law & Mental Hlth, Gothenburg, Sweden
[7] Orebro Univ, Sch Med Sci, Orebro, Sweden