RT Journal Article SR Electronic T1 Idiopathic pulmonary fibrosis: present understanding and future options JF European Respiratory Review JO EUROPEAN RESPIRATORY REVIEW FD European Respiratory Society SP 132 OP 133 DO 10.1183/09059180.00001511 VO 20 IS 121 A1 R.M. du Bois YR 2011 UL http://err.ersjournals.com/content/20/121/132.abstract AB