1. Cognitive/Behavioral Neurology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
2. Laboratory for Neuroanatomy and Cerebellar Neurobiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
3. Athinoula A. Martinos Center for Biomedical Imaging and Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
4. Ataxia Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA