IL-6 treatment of the human lymphoblastoid cell line , SKW6 . 4 , leads to increased IgM production .
il-6 treatment of the human lymphoblastoid cell line , skw6 . 4 , leads to increased igm production .
B-protein_molecule O O O B-cell_line I-cell_line I-cell_line I-cell_line O B-cell_line I-cell_line I-cell_line O O O O B-protein_family_or_group O O