Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran. Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Department of Biology, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran. Research Center of Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran. Kidney Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.