1. Department of Oral Biology and Dental Anatomy, Faculty of Dentistry, Al-Azhar University (Assiut), Egypt and, Umm Al-Qura University, Saudi Arabia
2. Department of Oral Pathology, Faculty of Dentistry, Al-Azhar University, (Assiut), Egypt and Faculty of Applied Medical Science, Al-Baha University, Saudi Arabia
3. Department of Oral Medicine and Periodontology, Faculty of Dentistry, Al-Azhar University (Assiut), Egypt and Umm Al-Qura University, Saudi Arabia
4. Department of Oral and Maxillofacial Surgery Faculty of Dentistry, Al-Azhar University (Assiut), Egypt
5. Department of Pedodontics and Oral Health, Faculty of Dentistry, Al-Azhar University (Cairo), Egypt and Umm Al-Qura University, Saudi Arabia