Affiliation: | 1. Department of Endodontics, Faculty of Dentistry and Dental Research Center, Mashad, Iran;2. Tehran University of Medical Sciences (International Campus), Tehran, Iran Correspondence to: Dr Farzaneh Afkhami, Department of Endodontics, Tehran University of Medical Sciences (International Campus), P. O. Box: 1856714984, Tehran, Iran Tel: +98 3. 9155182252 Fax: +98 4. 511 5. 8829500 e-mail: farzaneh_afkhami@yahoo.com;6. Dental School and Dental Research Center, Azad University of Medical Sciences, Tehran, Iran |