Document Type : Original Article
Authors
1 Assistant Lecturer of Oral and Dental Biology, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
2 professor of oral and dental biology, Former Dean of the Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
3 Professor of Oral and Dental Biology, Faculty of Dentistry, Cairo University, Cairo, Egypt
4 Assistant Professor of Biochemistry, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt
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