1. Boston University Alzheimer's Disease and CTE Center, Boston University School of Medicine, Boston, Massachusetts.
2. Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts.
3. Data Coordinating Center, Boston University School of Public Health, Boston, Massachusetts.
4. Department of Neurology, Boston University School of Medicine, Boston, Massachusetts.
5. Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts.
6. Concussion Legacy Foundation, Waltham, Massachusetts.
7. Framingham Heart Study, Boston University School of Medicine, Boston, Massachusetts.
8. Department of Pathology, Boston University School of Medicine, Boston, Massachusetts.
9. VA Boston Healthcare System, Boston, Massachusetts.
10. Department Neurosurgery, Boston University School of Medicine, Boston, Massachusetts.
11. Department of Neurosurgery, Emerson Hospital, Concord, Massachusetts.
12. Environmental Health, Boston University School of Public Health, Boston, Massachusetts.