1. Faculty of Medicine, The Hashemite University, Zarqa
2. Medical Research Group of Egypt, Cairo
3. Faculty of Dentistry, University of Jordan
4. Department of Pathology, Microbiology and Forensic Medicine, School of Medicine, The University of Jordan, Amman, Jordan
5. Faculty of Medicine, Elrazi University, Khartoum, Sudan
6. Faculty of Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt