Association of non-Hodgkin's lymphoma with rheumatoid arthritis.
D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000150:complications* / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009520:New Zealand