TY - JOUR T1 - <em>From the authors</em> JF - European Respiratory Journal JO - Eur Respir J SP - 1137 LP - 1137 DO - 10.1183/09031936.00002708 VL - 31 IS - 5 AU - M. A. Kolodziej AU - L. Jensen AU - B. Rowe AU - D. Sin Y1 - 2008/05/01 UR - http://erj.ersjournals.com/content/31/5/1137.1.abstract N2 - We thank M.L. Duiverman, F.M. Struik and P.J. Wijkstra for the relevant comments and agree that development of new therapeutic options in severe-stable chronic obstructive pulmonary disease is required. We concur that the … ER -