1. Department of Dental Materials and Craniofacial Research Center; Dental School, Azad University (Tehran Branch); Tehran; Iran
2. Bioscience Research Centerm, College of Dentistry, the University of Tennessee Health Science Center; Memphis; TN; USA
3. Department of Restorative Sciences; Baylor College of Dentistry, Texas A&M University System Health Science Center; Dallas; TX; USA
4. Research Center for Pharmaceutical Nanotechnology and Department of Endodontics, Dental Faculty; Tabriz University (Medical Sciences); Tabriz; Iran
5. Department of Dental Materials; Kamal Asgar Research Center (KARC); Tehran; Iran