these studies have shown that urinary and serum levels of colony stimulating activity ( csa ) in patients with felty 's syndrome are low ( mean urine csa 10.0 and serum csa 4.0 ) when compared to patients with neutropenic disorders without rheumatoid arthritis ( mean urinary csa 26.8 and serum csa 9.4 ) .
C0015773
felty 's syndrome
C0003873
rheumatoid arthritis