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Estimated annual incidence of childhood pulmonary hypertension (PH) in the United Kingdom (groups 1–5) for infancy (0–1 yr), early childhood (1–5 yr), prepubescence (5–12 yr), and adolescence (12–18 yr). The average point prevalence for the years 2005–2019 inclusive is also given for each PH group and for the overall childhood population. See Figure E2 in the online supplement for confidence intervals.
