1. Department of Orthodontics and Oral Biology and orthodontist in the Cleft Palate Craniofacial Unit
2. Department of Preventive and Curative Dentistry Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands
3. Department of Oral Medicine and Surgery, University of Manchester, Manchester, United Kingdom, and a member of the Oslo Cleft Team, University of Oslo, Oslo, Norway.
4. Department of Oral Medicine and Surgery, University of Manchester, Manchester, United Kingdom
5. Department of Orthodontics and Oral Biology and Head of the Cleft Palate Craniofacial Unit, Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands.