title: Letter: Transfer factor in adult rheumatoid arthritis.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000097:blood / Q000175:diagnosis / Q000276:immunology* / Q000628:therapy; D005260:Female; D006801:Humans; D007112:Immunity, Maternally-Acquired; D007116:Immunization, Passive; D007962:Leukocytes; D008297:Male; D008875:Middle Aged; D014374:Tuberculin Test