1. Institute for Technology in Psychiatry, McLean Hospital , Belmont, MA, USA
2. Department of Psychiatry, Harvard Medical School , Boston, MA, USA
3. Department of Environmental Health, Harvard T. H. Chan School of Public Health , Boston, MA, USA
4. Football Players Health Study, Harvard Medical School , Boston, MA, USA
5. Department of Neurologic Surgery, Vanderbilt University Medical Center , Nashville, TN, USA
6. Department of Neurology, Harvard Medical School , Boston, MA, USA
7. Hinda and Arthur Marcus Institute for Aging Research and Deanna and Sidney Wolk Center for Memory Health, Hebrew SeniorLife , Boston, MA, USA
8. Spaulding Rehabilitation Hospital and Spaulding Research Institute , Boston, MA, USA
9. Department of Physical Medicine and Rehabilitation Service, Massachusetts General Hospital, Harvard Medical School , Boston, MA, USA
10. Department of Physical Medicine and Rehabilitation, Brigham and Women's Hospital, Harvard Medical School , Boston, MA, USA