1. Research Unit of Child and Adolescent Psychiatry, Psychiatric Hospital; Aalborg University Hospital; Aalborg Denmark
2. Clinical Psychology and Epidemiology, Institute of Psychology; University of Basel; Basel Switzerland
3. Department of Child and Adolescent Psychiatry; University of Zurich; Zurich Switzerland
4. Department M; Aarhus University Hospital; Risskov Denmark
5. Institute for Biological Psychiatry; Psychiatric Centre St. Hans; Roskilde Denmark