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