title: Letter: Multiple sclerosis with hypocomplementaemia.
mesh_terms: D001327:Autoimmune Diseases; D003176:Complement C3 / Q000172:deficiency*; D003165:Complement System Proteins / Q000172:deficiency*; D006801:Humans; D009103:Multiple Sclerosis / Q000276:immunology*
chemical_list: D003176:Complement C3; D003165:Complement System Proteins