1. Ministry of Health, Dr Ismail Fehmi Cumalioglu City Hospital, Unit of Pharmacovigilance and Rational Use of Drugs, Tekirdag, Turkey
2. Department of Medical Services and Techniques, Vocational School of Health Services, Istanbul Rumeli University, Istanbul, Istanbul, Turkey
3. Department of Neurosurgery, Halic University School of Medicine, Istanbul, Istanbul, Turkey
4. Department of Neurosurgery, Kadikoy Medicana Hospital, Istanbul, Istanbul, Turkey
5. Department of Medical Pharmacology, İzmir Bakırçay University School of Medicine, Izmir, Izmir, Turkey
6. Department of Neurosurgery, Istanbul Koc University School of Medicine, Istanbul, Istanbul, Turkey