[1] Univ Hosp RWTH Aachen, Aachen, Germany
[2] Univ Hosp Frankfurt, Frankfurt, Germany
[3] Psychiat Univ Clin, Basel, Switzerland
[4] Univ Basel, Basel, Switzerland
[5] Vrije Univ Amsterdam, Med Ctr, Amsterdam, Netherlands
[6] Ctr Addict & Mental Hlth, Toronto, ON, Canada
[7] Univ Southampton, Southampton, Hants, England
[8] Birmingham City Univ, Birmingham, W Midlands, England
[9] Univ Birmingham, Ctr Human Brain Hlth, Sch Psychol, Birmingham, W Midlands, England
[10] Univ Hosp Mutua Terrassa, Child & Adolescent Mental Hlth Unit, Barcelona, Spain
[11] Basurto Univ Hosp, Psychiat Serv, Bilbao, Spain
[12] Univ Szeged, Pediat & Child Hlth Ctr, Szeged, Hungary
[13] Natl & Kapodistrian Univ Athens, Athens, Greece
[14] Boys Town Natl Res Hosp, Ctr Neurobehav Res, Omaha, NE 68131 USA
[15] Univ Bath, Bath, Avon, England