Q: Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.
Abstract: A comparison of hospitalized epileptic patients with matched normals showed that the mean whole blood manganese (Mn) concentration of the epileptic population was significantly lower than the mean of the normal population. The whole blood Mn concentration in the epileptics did not correlate either with seizure frequency or with anticonvulsant therapy. It was observed, however, that patients whose epilepsy was a result of trauma had significantly higher blood Mn concentrations than patients whose history was negative for trauma.
A:
Adolescence