1 From the Division of Neurology (P.R.N., P.H.J.), Department of Clinical Medicine; Department of Clinical Medicine (G.S.G.); and Division of Radiology (D.A.D., J.D.V.C.), Federal University of Ceará, Brazil. paulo_r_med@yahoo.com.br.
2 From the Division of Neurology (P.R.N., P.H.J.), Department of Clinical Medicine; Department of Clinical Medicine (G.S.G.); and Division of Radiology (D.A.D., J.D.V.C.), Federal University of Ceará, Brazil.