Using genome-wide complex trait analysis to quantify ‘ missing heritability ’ in Parkinson ’ s disease

Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA, Department of Biological Anthropology, Temple University, Philadelphia, PA, USA, Institut National de la Sante et de la Recherche Medicale, UMR 1043, Centre de Physiopathologie de Toulouse-Purpan, Toulouse, France, Paul Sabatier University, Toulouse, France Department of Molecular Neuroscience, Institute of Neurology and UCL Genetics Institute, University College London, London, UK deCODE genetics, Scientific Services, Sturlugata 8,