1. Department of Orthodontics, Faculty of Dentistry, University of Oslo, Norway.
2. University of Oslo, Norway.
3. Department of Plastic Surgery, The National Hospital, Oslo, Norway.
4. School of Dentistry, University of Manchester, United Kingdom, is affiliated with the Oslo Cleft Team, Department of Plastic Surgery, University Hospital and Bredtvet Resource Center, and is Adjunct Professor at the Faculty of Dentistry, University of Oslo, Norway.