RT Journal Article SR Electronic T1 The use of online visual analogue scales in idiopathic pulmonary fibrosis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2101531 DO 10.1183/13993003.01531-2021 A1 Moor, Catharina C. A1 Mostard, Remy L.M. A1 Grutters, Jan C. A1 Bresser, Paul A1 Wijsenbeek, Marlies S. YR 2021 UL //www.qdcxjkg.com/content/early/2021/07/21/13993003.01531-2021.abstract AB