Fig. 3From: Reduced induction of anti-PF4/heparin antibody in RA patients after total knee arthroplastyPreoperative serum levels of PF4 in RA patients and OA patients. Preoperative serum levels of PF4 were determined by ELISA in RA patients and OA patients. Results expressed as the mean ± standard deviation. There was no significant difference in serum levels of PF4 between RA patients and OA patients. OA osteoarthritis, RA rheumatoid arthritisBack to article page