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Box and whiskers plot of p16INK4a mRNA levels in PBTLs among nonfrail, prefrail and frail older adults undergoing CAB (coronary artery bypass). The box demonstrates the median value and interquartile range, whereas whiskers demonstrate upper and lower limits of p16INK4a mRNA levels in PBTLs (peripheral blood T-lymphocytes) among groups within calculated fences.
