1. Molecular Neurogenetics Unit, Center for Human Genetic Research, Massachusetts General Hospital, Boston, MA, USA
2. Medical Research Council (MRC) Centre for Neuropsychiatric Genetics and Genomics, Department of Psychological Medicine and Neurology, School of Medicine, Cardiff University, Cardiff, UK
3. Department of Neurology, Harvard Medical School, Boston, MA, USA
4. Department of Neurology, University of Ulm, Germany
5. Department of Neurology and Genome Science Institute, Boston University School of Medicine, Boston, MA, USA
6. CHDI Foundation, Princeton, NJ, USA
7. Medical and Population Genetics Program, The Broad Institute of M.I.T. and Harvard, Cambridge, MA, USA
8. Department of Genetics, Harvard Medical School, Boston, MA, USA