in this study , synovial fluids from 4 groups of patients have been compared : ( 1 ) ra patients on gold/penicillamine , ( 2 ) ra patients on non-steriodal anti-inflammatory drugs ( nsaid ) only , ( 3 ) osteoarthritis patients , and ( 4 ) patients with sero-negative arthropathies .
C0030817
penicillamine
C0003873
ra