1. Department of Removable Prosthodontics, Faculty of Dental Medicine, Saint-Joseph University, Beirut, Lebanon.
2. Department of Operative Dentistry, RWTH Aachen University, Aachen, Germany.
3. Department of Pediatric Dentistry, Faculty of Dental Medicine, Saint-Joseph University, Beirut, Lebanon.
4. Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.
5. Biomedical Engineering Program, Maroun Semaan Faculty of Engineering and Architecture, American University of Beirut, Beirut, Lebanon.
6. Department of Propaedeutics of Dental Diseases, Medical Institute, Peoples' Friendship University of Russia, Moskva, Russia.
7. Department of Fixed Prosthodontics, Faculty of Dental Medicine, Saint-Joseph University, Beirut, Lebanon.