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Leukocyte levels across the experimental period in captive high- and low-elevation adult male Hawaii Amakihi with CORT or sham implants. The number of leukocytes per milliliter of blood was greater in low- than in high-elevation birds (estimate: 0.080±0.035, CI: 0.014 to 0.15). Values are presented as means±s.e.m. (sample sizes are indicated on the figure).
