title: B-cell alloantigen Ag 7a in multiple sclerosis.
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology*; D006680:HLA Antigens; D006648:Histocompatibility; D006801:Humans; D007519:Isoantigens; D009103:Multiple Sclerosis / Q000276:immunology*
chemical_list: D006680:HLA Antigens; D007519:Isoantigens