1. Istanbul University, Faculty of Dentistry, Department of Prosthodontics, Istanbul
2. Yıldız Technical University, Science and Technology Application and Research Center, Istanbul
3. Pôle de Médecine et de Chirurgie Bucco-Dentaire, Hôpitaux Universitaires de Strasbourg
4. Faculté de Chirurgie Dentaire, Université de Strasbourg
5. University of Zürich, Dental Materials Unit, Center for Dental and Oral Medicine Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zürich