1. Department of Neurology and Algology, Gazi University Medical School, Besevler, Ankara, Turkey
2. Neuropsychiatry Centre, Gazi University, Besevler, Ankara, Turkey
3. Lund University, Department of Medicine, Institute of Clinical Sciences, Lund, Sweden
4. Department of Pharmacology, Gazi University Faculty of Medicine, Besevler, Ankara, Turkey