1. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts; MassGeneral Hospital for Children Sports Concussion Program, Boston, Massachusetts; Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA.
2. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA; Schoen Adams Research Institute at Spaulding Rehabilitation, Charlestown, Massachusetts, USA; MassGeneral Hospital for Children Sports Concussion Program, Boston, Massachusetts, USA; Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA.
3. Department of Physical Medicine and Rehabilitation, Massachusetts General Hospital, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts, USA; Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA.
4. College of Osteopathic Medicine, University of New England, Biddeford, Maine, USA.
5. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA; MassGeneral Hospital for Children Sports Concussion Program, Waltham, MA; & Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA.