RT Journal Article SR Electronic T1 6-minute walk distance as a predictor of outcome in idiopathic pulmonary fibrosis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1822 OP 1823 DO 10.1183/09031936.00213313 VO 43 IS 6 A1 Marco Mura YR 2014 UL http://erj.ersjournals.com/content/43/6/1822.abstract AB