1. Department of Pediatric Neurology, Charité, Virchow Clinics, Humboldt University, Augustenburger Platz 1, 13353 Berlin, Germany.
2. Medical Research Institute, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyodku, Tokyo, Japan.
3. Department of Psychiatry, Washington University School of Medicine, 4940 Children's Place, St. Louis, MO 63110, USA.