1. King Khalid University, Saudi Arabia; Cairo University, Egypt
2. King Khalid University, Saudi Arabia
3. Albaha University, Saudi Arabia
4. King Khalid University, Saudi Arabia; Damanhour University, Egypt
5. King Khalid University, Saudi Arabia; National Organization for Research and Control of Biologicals, Egypt
6. Jazan University, Saudi Arabia; University of El-Sadat City, Egypt
7. King Khalid University, Saudi Arabia; Sana'a University, Republic of Yemen
8. VACSERA ˗ the Holding Company for Biological Products and Vaccines, Egypt
9. Cairo University, Egypt
10. King Khalid University, Saudi Arabia; Mansoura University, Egypt