1. Oral Medicine, Periodontology, Diagnosis and Oral Radiology Department, Faculty of Dentistry Mansoura University Mansoura City Egypt
2. Department of Diagnostic Radiology, Faculty of Medicine Mansoura University Mansoura City Egypt
3. Oral and Maxillofacial Diagnostic Sciences University of Florida College of Dentistry Gainesville Florida USA
4. Center for Orphaned Autoimmune Disorders (COAD) University of Florida College of Dentistry Gainesville Florida USA
5. Department of Endodontics College of Dentistry, University of Florida Gainesville Florida USA