2048
A probe evoked potentials procedure was used to assess the relative engagement of both cerebral hemispheres during a language task in the following four groups of dextral adults : left hemisphere ( LH ) - damaged aphasics recovering from stroke , dysarthrics , right hemisphere ( RH ) - damaged nonaphasic patients , and normal control subjects .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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