1. Oral Biology Department, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt
2. Oral and Maxillofacial Pathology Department, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt
3. Department of Oral and Maxillofacial Diagnostic Sciences, College of Dentistry and Hospital, Taibah University, Medina, Saudi Arabia
4. Oral Pathology Department, College of Dental Medicine, Umm Alqura University, Makkah, Saudi Arabia