Tord Ivarsson, Centre for Child and Adolescent Mental Health, Oslo, Center for Child and Adolescent Mental Health, Sahlgrenska Academy, Norwegian University of Science and Technology, The Center for Child and Adolescent Mental Health. Eastern and Southern Norway (RBUP), University of Gothenburg, Regional Centre for Child and Youth Mental Health and Child Welfare, Eastern & Southern Norway, Ctr Child & Adolescent Mental Hlth, Eastern & Southern Norway, Reg Ctr Child & Adolescent Mental Hlth, Norway