Validation and minimum important difference of the UCSD Shortness of Breath Questionnaire in fibrotic interstitial lung disease oleh Tao Chen, Amy Po Yu Tsai, Seo Am Hur, Alyson W. Wong, Mohsen Sadatsafavi, Jolene H. Fisher, Kerri A. Johannson, Deborah Assayag, Julie Morisset, Shane Shapera, Nasreen Khalil, Charlene D. Fell, Helene Manganas, Gerard Cox, Teresa To, Andrea S. Gershon, Nathan Hambly, Andrew J. Halayko, Pearce G. Wilcox, Martin Kolb, Christopher J. Ryerson