[On the problem of polyserositis in infectious nonspecific polyarthritis].
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000150:complications*; D002908:Chronic Disease; D006801:Humans; D007249:Inflammation; D012700:Serositis / Q000209:etiology*
ARTHRITIS, RHEUMATOID/complications; SEROSITIS/etiology