RT Journal Article SR Electronic T1 The new definition of pulmonary hypertension JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 790 OP 791 DO 10.1183/09031936.00056809 VO 34 IS 4 A1 Hoeper, M. M. YR 2009 UL http://erj.ersjournals.com/content/34/4/790.abstract AB