RT Journal Article SR Electronic T1 Identifying early pulmonary arterial hypertension in patients with systemic sclerosis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1800495 DO 10.1183/13993003.00495-2018 VO 51 IS 4 A1 Condliffe, Robin A1 Kovacs, Gabor YR 2018 UL http://erj.ersjournals.com/content/51/4/1800495.abstract AB