1. Director of Biomaterial and Prosthodontics Laboratory Department of Restorative Dentistry Rutgers School of Dental Medicine Newark NJ USA
2. Department of Endodontics Arthur A. Dugoni School of Dentistry University of the Pacific San Francisco CA USA
3. Department of Preventive and Restorative Dental Sciences San Francisco School of Dentistry University of California San Francisco CA USA
4. Abdolmaleki Consulting Group British Columbia BC Canada