1. Department of Cariology; Institute of Odontology; The Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
2. Department of Preventive and Community Dentistry; Public Dental Health Service; Västra Götaland Region; Gothenburg Sweden
3. Specialist Clinic of Oral and Maxillofacial Radiology; Public Dental Health Service; Västra Götaland Region; Gothenburg Sweden