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Correlations among plasma cytokines in young donors and centenarians. Correlograms show the correlations among plasma levels of the measured cytokines in control subjects (upper panel) and centenarians (lower panel). Spearman R values are shown from orange (−1.0) to green (1.0); r values are indicated by color and square size. Blank fields with dots indicate lack of signal. Statistical significance is indicated by * =p < 0.05, ** =p < 0.01, and *** =p < 0.001 inside each square.
