title: A screening test for IgG deficiency.
mesh_terms: D001800:Blood Specimen Collection; D006801:Humans; D005779:Immunodiffusion; D007074:Immunoglobulin G / Q000032:analysis*; D007153:Immunologic Deficiency Syndromes / Q000175:diagnosis*; D007456:Iodine Isotopes; D011233:Precipitin Tests
chemical_list: D007074:Immunoglobulin G; D007456:Iodine Isotopes