The patients carrying B27 antigen had lymphocytic receptor concentrations under the levels of such in patients free of the antigen carriage .
the patients carrying b27 antigen had lymphocytic receptor concentrations under the levels of such in patients free of the antigen carriage .
O B-multi_cell O B-protein_molecule I-protein_molecule O O O O O O O O O O B-multi_cell O O O O O O