Department of Psychiatry (McAllister) and Department of Biostatistics and Health Data Science (Perkins, Katz), Indiana University School of Medicine, Indianapolis; Michigan Concussion Center, University of Michigan, Ann Arbor (Broglio); Richard M. Fairbanks School of Public Health, Indiana University, Indianapolis (Perkins, Katz); Department of Physical Medicine and Rehabilitation, Uniformed Services University, and Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, Md. (Pasquina); Department of Neurosurgery, Medical College of Wisconsin, Milwaukee (McCrea).