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Classification according to a) the prior and b) the new haemodynamic definition of pulmonary hypertension (PH) in the University of Michigan cohort. RHC: right heart catheterisation; PAH: pulmonary arterial hypertension; mPAP: mean pulmonary arterial pressure; PAWP: pulmonary arterial wedge pressure; PVR: pulmonary vascular resistance; WU: Wood Units.
