| http://www.w3.org/ns/prov#value | - While more severe cases often involve loss of consciousness, debilitating headaches, nausea, seizures and lack of sleep, ???Mild TBI can be difficult to diagnose because of the lack of obvious external injury,??? says Mingxiong Huang, lead author of the new study.As a result, a patient may go undiagnosed for months, though symptoms such as fatigue, headaches, and problems with memory and concentra
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