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Forest plot showing the effect of alleles associated with longer leukocyte telomere length on risk of (A) all glioma, (B) GBM only, and (C) non-GBM only. Diamonds represent overall causal effects estimated using random-effects inverse-variance-weighted (IVW-RE) models. Confidence intervals (CIs) are indicated by diamond width. The vertical line denotes the null value (ORSD = 1). Abbreviations: GBM, glioblastoma multiforme; ORSD, ORs per 1 SD unit increase in the putative risk factor.
