About the Authors

Abir O. El Sadik

Affiliation Anatomy and Embryology Department, Faculty of Medicine, Cairo University, Cairo, Egypt

Tarek A. El Ghamrawy

tarekabdelmoniem@gmail.com

Affiliation Anatomy and Embryology Department, Faculty of Medicine, Cairo University, Cairo, Egypt

Tarek I. Abd El-Galil

Affiliation Anatomy and Embryology Department, Faculty of Medicine, Cairo University, Cairo, Egypt

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TAG AOS. Performed the experiments: TAG AOS TIG. Analyzed the data: TAG AOS TIG. Contributed reagents/materials/analysis tools: TAG AOS TIG. Wrote the paper: TAG AOS TIG.