Pulmonary infections and rheumatoid arthritis.
D000328:Adult; D000368:Aged; D000375:Aging; D001172:Arthritis, Rheumatoid / Q000209:etiology*; D001987:Bronchiectasis / Q000150:complications*; D001991:Bronchitis / Q000150:complications*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000150:complications; D012189:Retrospective Studies; D012723:Sex; D012907:Smoking