1. Department of Conservative Dentistry, College of Dentistry, University of Almaaqal, Basrah, Iraq
2. Department of Oral Medicine, College of Dentistry, University of Basrah, Basrah, Iraq
3. Department of Maxillofacial Surgery, College of Dentistry, University of Almaaqal, Basrah, Iraq
4. Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq