**Author details**

Tanya Kitova1 \*, Borislav Kitov2 , Denis Milkov4 and Aida Masmoudi3

\*Address all correspondence to: tanyakitova@yahoo.com

1 Department of Anatomy, Histology and Embryology, Medical University of Plovdiv, Plovdiv, Bulgaria

2 Department of Neurosurgery, Medical University of Plovdiv, Plovdiv, Bulgaria

3 University of Tunis—El Manar, Faculty of Medicine of Tunis, Center of Maternity and Neonatology of Tunis, Tunis, Tunisia

4 Medical Faculty, Medical University of Plovdiv, Plovdiv, Bulgaria
