RT Journal Article SR Electronic T1 Simply the best: the 2004 ERS/ATS web guidelines for management of COPD JF Breathe JO Breathe FD European Respiratory Society SP 11 OP 12 DO 10.1183/18106838.0101.11 VO 1 IS 1 A1 M. Roberts YR 2004 UL http://breathe.ersjournals.com/content/1/1/11.abstract AB