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Flow diagram for determining Chronic Traumatic Encephalopathy (CTE) research diagnostic criteria in soccer players. * The minimum period of clinical stability after head impact exposure has not been defined but should be several years. ** Parkinsonism, motor neuron disease, or others *** Anxiety, apathy, depression, or paranoia. **** Functional limitations should at least reflect subtle functional limitations for possible CTE and mild dementia for probable CTE
