PT - JOURNAL ARTICLE AU - W R Perera TI - Ambroxol and reduction of COPD exacerbations AID - 10.1136/thx.2004.la0081 DP - 2004 Apr 01 TA - Thorax PG - 336--336 VI - 59 IP - 4 4099 - http://thorax.bmj.com/content/59/4/336.short 4100 - http://thorax.bmj.com/content/59/4/336.full SO - Thorax2004 Apr 01; 59