1. From the Child Psychiatry Clinic and University Hospital of Turku; and Department of Biostatistics, Turku University, Turku, Finland; Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital Hamburg-Eppendorf, Germany; Department of Child and Adolescent Neuropsychiatry, University of Vienna, Austria; and Clinic of Child and Adolescent Psychiatry, Basel University Hospital, Basel, Switzerland; Department of Psychology, University of Aarhus, Denmark; Psychological Medicine...