1. Department of Neurology Sean M. Healey and AMG Center for ALS and the Neurological Clinical Research Institute, Massachusetts General Hospital, Harvard Medical School Boston Massachusetts United States
2. Implicit Bioscience, Ltd Brisbane Australia
3. Department of Neurology Brigham and Women's Hospital, Harvard Medical School Boston Massachusetts United States
4. Department of Physical Medicine and Rehabilitation Spaulding Rehabilitation Hospital, Harvard Medical School Boston Massachusetts United States