[1] Kings Coll London, Inst Psychiat, Social Genet & Dev Psychiat Ctr, London SE5 8AF, England
[2] St James Hosp, Trinity Ctr Hlth Sci, Dept Psychiat, Dublin 8, Ireland
[3] Univ Nijmegen, Med Ctr, Dept Human Genet, Nijmegen, Netherlands
[4] Univ Nijmegen, Med Ctr, Dept Psychiat, Nijmegen, Netherlands
[5] Geha Mental Hlth Ctr, ADHD Clin, Petah Tiqwa, Israel
[6] Amsterdam Med Ctr Bascule, Amsterdam, Netherlands
[7] Univ Clin Child Adolescent Psychiat, Amsterdam, Netherlands
[8] Univ Gottingen, Gottingen, Germany
[9] Univ Ghent, Dept Expt Clin Hlth Psychol, B-9000 Ghent, Belgium
[10] Shaare Zedek Med Ctr, Jerusalem, Israel
[11] Univ Valencia, Dept Dev & Educ Psychol, Valencia, Spain
[12] Univ Groningen, Univ Med Ctr Groningen, Univ Ctr Child & Adolescent Psychiat, NL-9713 AV Groningen, Netherlands
[13] Vrije Univ Amsterdam, Amsterdam, Netherlands
[14] Univ Southampton, Sch Psychol, Southampton, Hants, England
[15] SUNY Syracuse, Dept Psychiat & Neurosci & Physsiol, Syracuse, NY USA