Affiliation: | 1. Division of Mental Health, Norwegian Institute of Public Health, PO Box 4404, Nydalen, 0403, Oslo, Norway 3. Statistics Norway, Oslo, Norway 6. Department of Occupational Medicine and Epidemiology, National Institute of Occupational Health, Oslo, Norway 7. Institute of Health and Society, University of Oslo, Oslo, Norway 4. University Children’s Hospital, Zurich, Switzerland 5. Department of Pediatrics, S?rlandet Hospital, Kristiansand, Norway 8. Medical Birth Registry of Norway, Norwegian Institute of Public Health, Bergen, Norway 9. Department of Global Public Health and Primary Health Care, University of Bergen, Bergen, Norway 2. Institute of Psychology, University of Oslo, Oslo, Norway
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