1. Department of Neurosurgery, Nasser Institute for Research and Treatment, Cairo, Egypt
2. Faculty of Medicine, Zagazig University, Zagazig, Egypt
3. Department of Neurosurgery, Albert Einstein College of Medicine, New York City, NY, USA
4. Department of Radiology, Mayo Clinic, Rochester, MN, USA
5. Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
6. Department of Physical Therapy and Rehabilitation, Fenerbahce University, Istanbul, Turkey
7. Neurosurgery Clinic, FSM Training and Research Hospital, Istanbul, Turkey