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Flowchart showing how the cohort was constructed from the UK RR databases. At RRT start, patients were present in one database. During follow-up, data for paediatric patients moved to the adult database if they transferred to adult services. There were no data queries from the adult database. Further details around missing and discordant data are available in Supplementary Table S1. UKRR, UK Renal Registry; RRT, renal replacement therapy.
