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Depiction of the geographical distribution of participants in (a). The NIHR BioResource Rare Disease study and the National Cohort Study of Idiopathic and Heritable Pulmonary Arterial Hypertension (PAH) (b) in the RAPID‐PAH study. The size of the plotting character represents the participant count (c). Consort diagram of RAPID PAH (d). Demographic characteristics of participants.
