1. Cleft Palate and Craniofacial Center, Department of Plastic Surgery, Helsinki University Hospital, Helsinki, Finland;
2. Copenhagen Cleft Palate Centre, University Hospital of Copenhagen, Denmark;
3. Center for Cleft Lip and Palate, Bergen University Hospital Haukeland, Bergen, Norway;
4. Department of Plastic Surgery, Royal Manchester Children’s Hospital, Manchester, UK;
5. Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Rikshospitalet Oslo, Norway;
6. Stockholm Craniofacial Team, Karolinska University Hospital, Stockholm, Sweden;
7. Department of Plastic Surgery, University Hospital, Linköping, Sweden;
8. The Royal Hospital for Sick Children, Belfast, N. Ireland;
9. Department of Plastic Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden;
10. University of Manchester, Manchester, UK;
11. Dental School, University of Manchester, Manchester, UK;
12. Department of Plastic and Reconstructive Surgery, Oslo University Hospital Rikshospitalet, Statped sørøst, Oslo, Norway