PT - JOURNAL ARTICLE AU - D Köhler AU - J Fischer AU - F Raschke AU - B Schönhofer TI - Usefulness of GOLD classification of COPD severity AID - 10.1136/thorax.58.9.825 DP - 2003 Sep 01 TA - Thorax PG - 825--825 VI - 58 IP - 9 4099 - http://thorax.bmj.com/content/58/9/825.1.short 4100 - http://thorax.bmj.com/content/58/9/825.1.full SO - Thorax2003 Sep 01; 58