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Increased Plasma Endothelin-1 in Pulmonary Hypertension: Marker or Mediator of Disease?
Duncan J. Stewart, MD; Robert D. Levy, MD; Peter Cernacek, MD; David Langleben, MD
Annals of Internal Medicine 1991;114:464-469. doi:10.7326/0003-4819-114-6-464

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