1. Department of Endodontics “Sapienza” – University of Rome Rome Italy
2. Department of Endodontics Universitat Internacional de Catalunya Barcelona Spain
3. Faculty of Dentistry National University Health System Singapore City Singapore
4. Department of Endodontics Catholic University of Sacred Heart Rome Italy
5. Department of Conservative Dentistry and Periodontology and Center of Dental Traumatology University Hospital of Würzburg Würzburg Germany
6. Division of Clinical Dentistry School of Dentistry International Medical University Kuala Lumpur Malaysia