Affiliation: | 1. Department of Paediatric Dentistry, The Institute for Postgraduate Dental Education, Jönköping, Sweden;2. Department of Endodontics, School of Dentistry, Loma Linda University, Loma Linda, CA, USA;3. Department of Oral and Maxillo-Facial Surgery, Resource Center for Rare Oral Diseases, University Hospital (Rigshospitalet), Copenhagen, Denmark |