1. Histology and Cell Biology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
2. Anatomy and Embryology Department, Faculty of Medicine, Alasmarya Islamic University, Zliten. Libya
3. Pathology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
4. Department of Basic Medical Sciences, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Kingdom of Saudi Arabia
5. Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
6. Human Anatomy and Embryology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
7. Anatomy Department, College of Medicine, Jouf University, Sakaka, Saudi Arabia