1 The Nathan Kline Institute for Psychiatric Research Orangeburg New York U.S.A.
2 Saul R. Korey Department of Neurology Isabelle Rapin Division of Child Neurology Dominick P. Purpura Department of Neuroscience Albert Einstein College of Medicine Bronx New York U.S.A.
3 Department of Neurology New York University New York New York U.S.A.
4 Epilepsy Research Laboratory A.I. Virtänen Institute for Molecular Sciences University of Eastern Finland Kuopio Finland.
5 National Institute of Neurological Disorders and Stroke National Institutes of Health Bethesda Maryland U.S.A.