[1] East London NHS Fdn Trust, Mid Beds Clin, Bedford, England
[2] Epilepsy Ctr Kempenhaeghe, Dept Res & Dev, Heeze, Netherlands
[3] Maastricht Univ, MHENS Sch Mental Hlth & Neurosci, NL-6200 MD Maastricht, Netherlands
[4] Univ Calif Los Angeles, Semel Inst Neurosci & Human Behav, Los Angeles, CA 90024 USA
[5] Indiana Univ Sch Med, Riley Hosp Child & Adolescent Psychiat Clin, Indianapolis, IN 46202 USA
[6] Inst Neurol Sci Bologna, Child Neurol Unit, Bologna, Italy
[7] Univ Turku, Dept Publ Hlth, Turku, Finland
[8] Univ Turku, Dept Child Neurol, Turku, Finland