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