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Expression of COX-2 mRNA in the (A) plaque tissues, (B) PBMCs and (C) serum of healthy subjects and patients with coronary atherosclerosis. Reverse transcription-quantitative polymerase chain reaction was used to measure the expression of COX-2 mRNA. *P<0.05 and **P<0.01 vs. corresponding control group (adjacent tissues from patients or blood samples from healthy subjects). COX-2, cyclooxygenase-2; PBMCs, peripheral blood mononuclear cells.
