1. Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
2. BUP OCD and Related Disorders, Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden.
3. Centre for Psychiatry Research, Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden.
4. Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
5. Division of Pediatric Neurology, Karolinska University Hospital, Solna, Sweden.
6. Division of Pediatric Rheumatology, Karolinska University Hospital, Solna, Sweden.