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. 2022 May 8;164(10):2751–2765. doi: 10.1007/s00701-022-05225-7

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Fig. 5 — Relationship between proportion of each neoplastic finding and age, derived from restricted cubic spline meta-regression models. Purple dots show the findings of individual studies, with the size of the point relative to study sample size. Black lines are fitted estimates, while the shaded area is the 95% confidence interval of the fitted estimate