Table 2.

Preoperative data on rheumatoid arthritis patients

Gender	Age (years)	Samplesa	ESR	CRP	RF
Female	73	Left knee	89	19	62
Female	76	Right knee	47	16	70
Female	52	Left knee	90	30	75
Female	56	Right knee	60	23	57
Female	51	Left knee	96	14	91

ESR preoperative erythrocyte sedimentation rate (mm/h), CRP preoperative C-reactive protein levels (mg/l), RF preoperative rheumatoid factor (U/ml)

All the patients were clinically diagnosed as rheumatoid arthritis according to the manifestation, radiology and pathology

^aLocation where synovial membranes were dissected as clinical samples