RT Journal Article SR Electronic T1 Dyspnoea: a prognostic marker for idiopathic pulmonary fibrosis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 476 OP 476 DO 10.1183/09031936.00141610 VO 37 IS 2 A1 D. Aggarwal A1 P.R. Mohapatra YR 2011 UL http://erj.ersjournals.com/content/37/2/476.1.abstract AB