The results of the present study demonstrate that dysfunction of these genes also occurs during recurrence of glial tumors that were highly malignant at first presentation .
the results of the present study demonstrate that dysfunction of these genes also occurs during recurrence of glial tumors that were highly malignant at first presentation .
O O O O O O O O O O O B-DNA_family_or_group O O O O O B-tissue I-tissue O O O O O O O O