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. Author manuscript; available in PMC: 2012 Jul 26.
Published in final edited form as: Radiat Res. 2010 Sep;174(3):325–330. doi: 10.1667/RR1979.1

FIG. 2.

FIG. 2

Dose–response effects of proton radiation on lymphocyte counts in irradiated mice. The mice were irradiated with 1 GeV protons in five daily dose fractions at a dose rate of 0.05–0.07 Gy/min or in a single dose at a high (0.5 Gy/min) or low (0.05 Gy/min) dose rate (5–10 mice per group). The lymphocyte counts were determined 24 h after the last radiation exposure. The results were compared among different treatment groups by one-way ANOVA followed by Tukey’s test. The statistical significance for the difference between the sham-irradiated control and each of the irradiated groups is indicated by asterisks (*P < 0.05, **P < 0.01 and ***P < 0.001 by Tukey’s test). The error bars represent standard errors.