1. From the Department of Neurology (I.Ü.-Ç., Y.G.-Ö., T.D.), Faculty of Medicine, and the Institute of Neurological Sciences and Psychiatry, Hacettepe University, Ankara, Turkey; the Department of Neurology (M.K.), Faculty of Medicine, Baskent University, Ankara, Turkey; and the Department of Histology and Embryology (A.C.), Faculty of Medicine, Ankara University, Ankara, Turkey.