tokens: Double staining for Bcl-6 /CD20 , Bcl-6 /CD3 , and Bcl-6 /CD57 was performed in selected cases .
folded_tokens: double staining for bcl-6 /cd20 , bcl-6 /cd3 , and bcl-6 /cd57 was performed in selected cases .
labels: O O O B-protein_molecule O O B-protein_molecule O O O B-protein_molecule O O O O O O O