1. Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, P.R. China
2. Department of Anatomy, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, P.R. China
3. Department of Physiology and Biochemistry, Princess Basma Teaching Hospital, Faculty of Medicine, Jordan University of Science and Technology, Irbid 21110, Jordan