From the Departments of Neurosurgery (A.J.S., S.J.H., S.E.H., R.J.) and Chemistry (M.G.B., S.E.H., M.C.P.), King’s College London, London, United Kingdom, and Department of Clinical Neurophysiology, Glostrup Hospital, University of Copenhagen, Copenhagen, Denmark (M.F., M.L.). (At 2002-12)