PT - JOURNAL ARTICLE AU - du Bois, R.M. TI - Idiopathic pulmonary fibrosis: present understanding and future options AID - 10.1183/09059180.00001511 DP - 2011 Sep 01 TA - European Respiratory Review PG - 132--133 VI - 20 IP - 121 4099 - http://err.ersjournals.com/content/20/121/132.short 4100 - http://err.ersjournals.com/content/20/121/132.full SO - EUROPEAN RESPIRATORY REVIEW2011 Sep 01; 20