title: rheumatoid factors in primary and reactive macroglobulinaemia.
mesh_terms: D000354:Africa, Western; D001741:Black or African American; D000368:Aged; D001609:Beta-Globulins; D044383:Black People; D006801:Humans; D007841:Latex Fixation Tests; D008875:Middle Aged; D012217:Rheumatoid Factor; D012698:Serologic Tests; D013163:Splenomegaly / Q000175:diagnosis*; D014353:Trypanosomiasis, African / Q000175:diagnosis*; D008258:Waldenstrom Macroglobulinemia / Q000175:diagnosis*
chemical_list: D001609:Beta-Globulins; D012217:Rheumatoid Factor