1. Department of Neurosurgery, Azerbaijan Medical University, Baku, Azerbaijan,
2. Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq,
3. Faculty of Medicine, Mansoura University, Mansoura, Egypt,
4. University of Sharjah, College of Medicine, Sharjah, United Arab Emirates,
5. Department of Neurosurgery, University of Al-Nahrain, College of Medicine, Baghdad, Iraq,
6. Department of Neurosurgery, University of Al-Iraqia, College of Medicine, Baghdad, Iraq,
7. Department of Neurosurgery, University of Baghdad, College of Medicine, Baghdad, Iraq,
8. Department of Neurosurgery, University of Cincinnati, Cincinnati, Ohio, United States.