1. Department of Endodontics, Faculty of Dental Medicine, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
2. Department of Operative Dentistry, Faculty of Dental Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
3. Unit of Endodontics, Department of Medical Biotechnologies, Periodontology, Restorative and Pediatric Dentistry, University of Siena, 53100 Siena, Italy
4. Department of Rehabilitation Oro-Dental, Faculty of Dental Medicine, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania