1. Division of Orthodontics and Pediatric Dentistry Department of Dental Medicine Karolinska Institutet Stockholm Sweden
2. Center for Pediatric Oral Health Research Stockholm Sweden
3. Center for Oral Health Services and Research, Mid‐Norway, TKMidt Trondheim Norway
4. Clinical Epidemiology Department of Medicine Karolinska Institutet and Centre for Health Equity Studies Stockholm Sweden
5. Department of Pediatric Dentistry Eastman Institute Public Dental Service Stockholm Sweden