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Individual changes in serum YKL-40 (μg/l) after exercise test. Serum YKL-40 was measured at baseline, immediately after exercise, and once every hour for 6 h after exercise. The lines represent each individual. (a) CAD patients; (b) controls. The horizontal dotted line represent 95th percentile (YKL-40 concentration) according to the mean age for each group 10. CAD, coronary artery disease.
