RT Journal Article SR Electronic T1 Limitations of calculating “true” regression slope: impact on estimates of minimal important difference JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1296 OP 1297 DO 10.1183/09031936.00170910 VO 37 IS 5 A1 Dodd, J.W. A1 Jones, P. YR 2011 UL http://erj.ersjournals.com/content/37/5/1296.abstract AB