1 Department of Child and Adolescent Psychiatry, Universitätsklinikum Essen, University of Duisburg-Essen, Wickenburgstr. 21, 45147, Essen, Germany. johannes.hebebrand@uni-due.de.
2 Department of Child Psychiatry, General Pediatric Hospital of Athens "Aghia Sophia", Medical School, National and Kapodistrian University of Athens, Athens, Greek.
3 Département de l'instruction publique, de la culture et du sport (DIP), Office médico-pédagogique, Geneva, Switzerland.
4 Anna Horstinkstraat, 36, 1382 MN, Weesp, Netherlands.
5 Department of Psychiatry, School of Medicine, University of Belgrade, Belgrade, Serbia.
6 Associate Professor of Child Psychiatry, Leiden University Medical Centre, Leiden, Netherlands.