title: Nephelometric and immunodiffusion assays for the fourth component of complement in acquired C1 esterase inhibitor deficiency.
mesh_terms: D003174:Complement C1 Inactivator Proteins / Q000172:deficiency*; D003181:Complement C4 / Q000032:analysis*; D006801:Humans; D005779:Immunodiffusion; D007163:Immunosorbent Techniques; D009391:Nephelometry and Turbidimetry
chemical_list: D003174:Complement C1 Inactivator Proteins; D003181:Complement C4