1 Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA; Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA. Electronic address: ndrosu@mgh.harvard.edu.
2 Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
3 Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.