TY - JOUR T1 - Interpretation of treatment changes in six-minute walk distance in patients with COPD JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/09031936.00140507 AU - M.A. Puhan AU - M.J. Mador AU - U. Held AU - R. Goldstein AU - G.H. Guyatt AU - H.J. Schünemann Y1 - 2008/06/11 UR - http://erj.ersjournals.com/content/early/2008/06/11/09031936.00140507.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -