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Karr, J., Iverson, G., Berghem, K., Kotilainen, A., Terry, D., & Luoto, T. Complicated mild traumatic brain injury in older adults: Post-concussion symptoms and functional outcome at one week post injury. Brain Injury, 34(1), 26-33. https://doi.org/10.1080/02699052.2019.1669825 (Original work published 2020)