1. Department of Orthodontics, Institution of Odontology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden;
2. Mun-H-Center National Orofacial Resource Center for Rare Diseases, Public Dental Service in Västra Götaland, Gothenburg, Sweden;
3. Specialist Clinic of Orthodontics, Public Dental Service Västra Götaland, Gothenburg, Sweden;
4. Department of Orthodontics, School of Dental Medicine, University of Geneva, Geneva, Switzerland