RT Journal Article SR Electronic T1 A united states-based registry for pulmonary arterial hypertension: 1982–2006 JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00042107 A1 T Thenappan A1 S.J. Shah A1 S. Rich A1 M. Gomberg-Maitland YR 2007 UL http://erj.ersjournals.com/content/early/2007/09/05/09031936.00042107.abstract AB