1. Department of Oral Medicine, Diagnosis and Periodontology; Faculty of Dentistry; Al Azhar University (Girls Branch); Cairo Egypt
2. Department of Oral Medicine, Diagnosis and Periodontology; Faculty of Dentistry; Nahda University; Beni-Suef Egypt
3. Department of Oral Medicine, Diagnosis and Periodontology; Faculty of Dentistry; Suez Canal University; Ismailea Egypt
4. Nahda University; Beni-Suef Egypt
5. Department of Oral Patholology; Faculty of Oral and Dental Medicine; Ahram Canadian University; 6th of October Egypt
6. Department of Oral Medicine and Periodontology; Faculty of Dentistry; Tanta University; Tanta Egypt
7. Department of Oral Biology; Faculty of Dentistry; Al Azhar University (Girls Branch); Cairo Egypt
8. Department of Oral Medicine and Periodontology; Faculty of Dentistry; Beni-Suef University; Beni-Suef Egypt