1 Department of Neurology, Emory University, Atlanta, Georgia, USA
2 Department of Human Genetics, Emory University, Atlanta, Georgia, USA
3 Department of Pediatrics, Emory University, Atlanta, Georgia, USA
4 Department of Neurology and Psychiatry, “Sapienza” University of Rome and Scientific Institute for Cancer Research and Treatment (IRCCS)Neuromed Institute, Rome, Italy
5 Department of Neurological Sciences, Rush Medical College, Chicago, Illinois, USA
6 Department of Basic Medical Sciences, Neurosciences, and Sense Organs, “Aldo Moro” University of Bari, Bari, Italy
7 Department of Psychiatry, Emory University, Atlanta, Georgia, USA
8 National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
9 Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
10 Department of Communication Sciences and Disorders, James Madison University, Harrisonburg, Virginia, USA
11 Department of Neurology, Washington University, St. Louis, Missouri, USA
12 Department of Radiology, Washington University, St. Louis, Missouri, USA
13 Department of Neurobiology, Washington University, St. Louis, Missouri, USA
14 Programs in Occupational Therapy and Physical Therapy, Washington University, St. Louis, Missouri, USA