1. Department of Orthodontics Academic Center for Dentistry, Amsterdam, the Netherlands, Member of the Cleft Palate Team of the Vrije Universiteit, University Medical Center, Amsterdam, the Netherlands.
2. Department of Orthodontics, Dijkzigt University Hospital Rotterdam, the Netherlands.
3. Department of Preventive and Curative Dentistry, Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands.
4. Department of Orthodontics and Oral Biology and Head of the Cleft Palate Craniofacial Unit of the Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands.