1. Oral Radiology; Department of Stomatology; School of Dentistry; Federal University of Santa Maria (UFSM); Santa Maria Brazil
2. Section of Oral Radiology; Department of Dentistry; Aarhus University; Aarhus Denmark
3. Department of Surgery and Orthopedics; School of Dentistry; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre Brazil
4. Deptartment of Periodontology; Faculty of Odontology; Malmö University; Malmö Sweden
5. Institute of Odontology; Copenhagen University; Copenhagen Denmark