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. 2015 Mar 13;3(1):cov006. doi: 10.1093/conphys/cov006

Figure 2:

Figure 2:

Daily variation in cortisol in redtail (left) and red colobus monkeys (right). Mainaro data are grey circles and dashed lines; Ngogo data are black squares and solid lines. The 95% confidence intervals are plotted.