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Figure 1 Relative risk of cerebral aneurysms by IL‐6 −572G>C and −174G>C haplotypes (bars are 95% confidence intervals). Haplotype numbers (cases/controls) were −572G/−174G, −572G/−174C and −572C/−174G. The frequency of the −572C/−174C haplotype was extremely low (<0.005) and was not included in the calculation of risk.
