1. Faculty of Dentistry, Padjadjaran University, Bandung, Indonesia.
2. Faculty of Dentistry, International Islamic University Malaysia, Kuantan, Malaysia.
3. Department of Dental Materials Science and Technology, Faculty of Dentistry, Padjadjaran University, Bandung, Indonesia.
4. Oral Biomaterials Study Centre, Faculty of Dentistry, Padjadjaran University, Bandung, Indonesia.
5. Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.