title: IgM, not 7S-IgM, as cause of increased serum IgM concentrations in goiter patients.
mesh_terms: D002499:Centrifugation, Density Gradient; D002850:Chromatography, Gel; D006042:Goiter / Q000150:complications / Q000276:immunology*; D006043:Goiter, Endemic / Q000276:immunology*; D006044:Goiter, Nodular / Q000276:immunology; D006111:Graves Disease / Q000276:immunology*; D006801:Humans; D006942:Hypergammaglobulinemia / Q000209:etiology / Q000276:immunology*; D005779:Immunodiffusion; D007074:Immunoglobulin G; D007136:Immunoglobulins / Q000032:analysis*
chemical_list: D007074:Immunoglobulin G; D007136:Immunoglobulins