tokens: Restriction enzyme analysis followed by Southern blot hybridization identified a significant increase in the fused fragment encompassing both ends of EBV DNA .
folded_tokens: restriction enzyme analysis followed by southern blot hybridization identified a significant increase in the fused fragment encompassing both ends of ebv dna .
labels: O O O O O B-other_name I-other_name I-other_name O O O O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group O