[1] Inst Psychiat, MRC, Social Genet Dev & Psychiat Ctr, London SE5 8AF, England
[2] St James Hosp, Dept Psychiat, Trinity Ctr Hlth Sci, Dublin 8, Ireland
[3] Radboud Univ Nijmegen, Nijmegen Med Ctr, Nijmegen, Netherlands
[4] S Herzog Mem Hosp, Jerusalem, Israel
[5] Triversum, Alkmaar, Netherlands
[6] Amsterdam Med Ctr Bascule, Amsterdam, Netherlands
[7] Univ Essen Gesamthsch, Clin Child & Adolescent Psychiat, Essen, Germany
[8] Geha Mental Hlth Ctr, ADHD Clin, Petah Tiqwa, Israel
[9] Univ Gottingen, D-3400 Gottingen, Germany
[10] Univ Ghent VIB, Dept Expt Clin Hlth Psychol, B-9052 Ghent, Belgium
[11] Shaare Zedek Med Ctr, Jerusalem, Israel
[12] Univ Groningen, Ctr Child & Adolescence Psychiat, NL-9700 AB Groningen, Netherlands
[13] Univ Valencia, Dept Dev & Educ Psychol, E-46003 Valencia, Spain
[14] Univ Zurich, Dept Child & Adolescent Psychiat, Zurich, Switzerland
[15] Vrije Univ Amsterdam, Amsterdam, Netherlands
[16] Univ Southampton, Sch Psychol, Southampton SO9 5NH, Hants, England
[17] SUNY Upstate Med Univ, Dept Psychiat, Syracuse, NY USA
[18] SUNY Upstate Med Univ, Dept Neurosci, Syracuse, NY USA
[19] SUNY Upstate Med Univ, Dept Physiol, Syracuse, NY USA