[1] Inst Psychiat, MRC, Social Genet Dev & Psychiat Ctr, London SE5 8AF, England
[2] Univ Hong Kong, LKS Fac Med, Dept Psychiat, Pokfulam, Hong Kong, Peoples R China
[3] Radboud Univ Nijmegen, Med Ctr, Dept Psychiat, NL-6525 ED Nijmegen, Netherlands
[4] Radboud Univ Nijmegen, Med Ctr, Dept Human Genet, NL-6525 ED Nijmegen, Netherlands
[5] Ctr Child & Adolescent Psychiat, Triversam, Alkmaar, Netherlands
[6] Amsterdam Med Ctr Bascule, Amsterdam, Netherlands
[7] Trinity Coll Dublin, Sch Med, Neuropsychiat Genet Res Grp, Dublin, Ireland
[8] Univ Clin Child & Adolescent Psychiat, Essen, Germany
[9] BAVO Europoort, Rotterdam, Netherlands
[10] Univ Ghent, Dept Expt Clin & Hlth Psychol, Ghent, Belgium
[11] Univ Gottingen, D-3400 Gottingen, Germany
[12] Shaare Zedek Med Ctr, Jerusalem, Israel
[13] Univ Valencia, Dept Dev & Educ Psychol, E-46003 Valencia, Spain
[14] Geha Mental Hlth Ctr, ADHD Clin, Petah Tiqwa, Israel
[15] Univ Groningen, Univ Med Ctr Groningen, Univ Ctr Child & Adolescence Psychiat, NL-9713 AV Groningen, Netherlands
[16] Univ Zurich, Dept Child & Adolescent Psychiat, CH-8006 Zurich, Switzerland
[17] Univ Southampton, Sch Psychol, Southampton, Hants, England
[18] Vrije Univ Amsterdam, Dept Clin Neuropsychol, Amsterdam, Netherlands
[19] Cent Inst Mental Hlth, Dept Child & Adolescent Psychiat & Psychotherapy, D-6800 Mannheim, Germany
[20] S Herzog Mem Hosp, Jerusalem, Israel
[21] Univ Hosp La Fe, Neuropediat Serv, Valencia, Spain
[22] SUNY Upstate Med Univ, Dept Psychiat, Syracuse, NY USA
[23] SUNY Upstate Med Univ, Dept Neurosci & Physiol, Syracuse, NY USA