1. Department of Medical Biochemistry, Faculty of Medicine, South Valley University, Qena, Egypt
2. Department of Medical Biochemistry, Faculty of Medicine, Assiut University, Assiut, Egypt
3. Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, Egypt
4. Department of Neurosurgery, Faculty of Medicine, South Valley University, Qena, Egypt
5. Medical Biochemistry Department, Faculty of Medicine, Sohag University, Sohag, Egypt