1. McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, United States
2. Laboratory for Neuroanatomy and Cerebellar Neurobiology, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, United States
3. Ataxia Unit, Cognitive Behavioral Neurology Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, United States
4. Department of Otolaryngology, Harvard Medical School, Boston, United States