1. From the Departments of Neurology (H.B., Y.G-Ö., T.D.) and Pharmacology (Y.S., R.O.), Faculty of Medicine, and Institute of Neurological Sciences and Psychiatry (H.B., Y.G-Ö., T.D.), Hacettepe University, and Department of Histology-Embryology, Ankara University School of Medicine (A.C.), Ankara, Turkey.