1. Department of Anatomy, College of Medicine and Medical Sciences, Arabian Gulf University, Kingdom of Bahrain.
2. Department of Microbiology, College of Medicine and Medical Sciences, Arabian Gulf University, Kingdom of Bahrain.
3. Department of Biochemistry, College of Medicine and Medical Sciences, Arabian Gulf University, Kingdom of Bahrain.
4. Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803.