Professional organizations

1. Dutch Association of Orthodontists 'NVvO'
2. Dutch Dental Association KNMT
3. Dutch Cleft Palate Craniofacial Society (NVSCA)
4. Dutch Society for the study of orthodontics (NVOS)
5. American Association of Orthodontics (AAO)
6. American Cleft Palate-Craniofacial Association (ACPA) and Cleft Palate Foundation (CPF)
7. American Board of Orthodontics (ABO)
8. College of Diplomates of the American Board of Orthodontics (CDABO) 
9. Angle Society of Europe
10. Charles Tweed Foundation
11. Craniofacial Society of Britain and Ireland
12. European Federation of orthodontic Specialist Associations (EFOSA)
13. European Federation of Orthodontics (FEO)
14. European Postgraduate Students Orthodontic Group (EPSOS)
15. International / American Association for Dental Research
16. Network of Erasmus Based European Orthodontic Programs (NEBEOP)
17. World Federation of Orthodontists (WFO)
18. World Federation of Postgraduate Orthodontic Students (WFPOS)
19. WFO affiliate organizations