Mark A Louter1, Thomas N Ward1, Gisela M Terwindt2. 1. From the Departments of Neurology (M.A.L., G.M.T.) and Psychiatry (M.A.L.), Leiden University Medical Center, the Netherlands; and Department of Neurology (T.N.W.), Geisel School of Medicine at Dartmouth, Hanover, NH. 2. From the Departments of Neurology (M.A.L., G.M.T.) and Psychiatry (M.A.L.), Leiden University Medical Center, the Netherlands; and Department of Neurology (T.N.W.), Geisel School of Medicine at Dartmouth, Hanover, NH. g.m.terwindt@lumc.nl.