1. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, School of Dentistry, Endodontic Unit, University of Pavia, Pavia, Italy.
2. Endodontic Department, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates.
3. Endodontic Unit, Dental Services Department, Dubai Health Authority, Dubai, United Arab Emirates.
4. Department of Conservative Dentistry, School of Dentistry, The University of Jordan, Amman, Jordan.
5. Department of Molecular Medicine and Center for Tissue Engineering (C.I.T.), University of Pavia, Pavia, Italy.
6. Department of Conservative Dentistry, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, Korea.