Department of Neurosurgery, Faculty of Medicine, Medipol University, Istanbul, Turkey

Mehmet Tokmak

To whom correspondence should be addressed at Department of Neurosurgery, Faculty of Medicine, Medipol University, Istanbul, Turkey

Mehmet Tokmak

Department of Histology and Embryology, Faculty of Medicine, Afyon Kocatepe University, Afyon, Turkey

Yasemin Yuksel

Department of Medical Biochemistry, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, Turkey

Muserref Hilal Sehitoglu

Department of Neurosurgery, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, Turkey

Mustafa Guven, Tarik Akman, Adem Bozkurt Aras & Murat Cosar

Department of Neurosurgery, Faculty of Medicine, Yale University, New Haven, CT, USA

Khalid M. Abbed