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. 2013 Apr 15;8:91. doi: 10.1186/1748-717X-8-91

Figure 2.

Figure 2

Cell survival curves at each depth in water. Cell survival assays were conducted with stacked OptiCell™ cell culture systems, irradiated with 290 MeV/n carbon ions: A-C and 70 MeV protons: D-F. Error bars indicate standard errors of the means from as many as four independent experiments.