1. Centre for Rare Disorders, Oslo University Hospital, Oslo, Norway;
2. Centre for Appearance Research, University of the West of England, Bristol, UK;
3. Department of Plastic Surgery, Cleft Palate and Craniofacial Centre, Helsinki University Central Hospital, Helsinki, Finland;
4. Copenhagen Cleft Palate Centre, University Hospital of Copenhagen, Denmark;
5. Department of Speech and Language Disorders, Statped Sørøst, Oslo, Norway;
6. Division of Speech and Language Pathology, Sahlgrenska University Hospital, Gothenburg, Sweden;
7. Department of Dentofacial Orthopedics, Maxillofacial Unit, University Hospital Linköping, Linkjöping, Sweden;
8. Division of Speech and Language Pathology, Stockholm Craniofacial Team, Karolinska University Hospital, Stockholm, Sweden;
9. Department of Speech and Language Disorders, Statped Vest, Bergen, Norway;
10. Cleft Palate Centre, Aarhus, Denmark;
11. Dental School, University of Manchester, Manchester, UK;
12. Private Practice, Manchester, UK;
13. Department of Plastic and Reconstructive Surgery, Oslo University Hospital Rikshospitalet, Oslo, Norway