title: Re.: Separation of hidden 19 S IgM rheumatoid factors by QAE columns.
mesh_terms: D002845:Chromatography / Q000379:methods; D006801:Humans; D007075:Immunoglobulin M / Q000302:isolation & purification; D012217:Rheumatoid Factor / Q000302:isolation & purification*
chemical_list: D007075:Immunoglobulin M; D012217:Rheumatoid Factor