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Trends in age- and gender-standardized incidence rate of gliomas in Wales and SEER by glioma grades 1997-2015.Data from the Secure Anonymised Information Linkage (SAIL) Databank in Wales and from the Surveillance, Epidemiology, and End Results (SEER) in the United States contributed to this analysis. Incidence rates were standardized to the European Standard Population 2013. Vertical dotted line denotes the year at which SEER began to include benign tumors.
