title: Letter: Immunoglobulin standards.
mesh_terms: D006801:Humans; D007118:Immunoassay / Q000592:standards*; D007074:Immunoglobulin G / Q000032:analysis; D007136:Immunoglobulins / Q000032:analysis*
chemical_list: D007074:Immunoglobulin G; D007136:Immunoglobulins