1. School of Dental Medicine, Department of Oral Surgery, University of Zagreb, Zagreb, Croatia.
2. Department of Endodontics and Restorative Dentistry and School of Dental Medicine, University of Zagreb, Zagreb, Croatia.
3. Department of Oral Surgery, School of Dental Medicine, University of Zagreb, Zagreb, Croatia.
4. Department of Pediatric and Preventive Dentistry, School of Dental Medicine, St Cyril and Methodius University in Skopje, Skopje, Macedonia.