[The presence of "rheuma factor" analogous serum substance in sarcoidosis (Boeck's disease)].
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006296:Health Services; D006801:Humans; D012507:Sarcoidosis / Q000276:immunology*
ARTHRITIS, RHEUMATOID/immunology; SARCOIDOSIS/immunology