Highly polarized HLA class II antigen processing and presentation by human intestinal epithelial cells .
highly polarized hla class ii antigen processing and presentation by human intestinal epithelial cells .
O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O B-cell_type I-cell_type I-cell_type I-cell_type O