1. Ataxia Unit, Cognitive Behavioral Neurology Unit, Laboratory for Neuroanatomy and Cerebellar Neurobiology, Department of Neurology Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
2. Cognitive Neuroscience Research Unit (URNC), Department of Psychiatry and Forensic Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
3. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
4. Psychology Assessment Center, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA