aDepartment of Public Health, Hjelt Institute, University of Helsinki
bDepartment of Adolescent Psychiatry, Helsinki University Central Hospital, Helsinki
cInstitute of Clinical Medicine, Child Psychiatry, University Of Turku, Turku
dDepartment of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland
eParnassia Psychiatric Institute, The Hague
fDepartment of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
gDepartment of Epidemiology, Columbia University, New York, USA
Correspondence to Dr Anu Raevuori, MD, PhD, Department of Public Health, Hjelt Institute, University of Helsinki, PO Box 41 (Mannerheimintie 172) FIN-00014, Helsinki, Finland. Tel: +358 2 941 27 325; e-mail: [email protected]