PT - JOURNAL ARTICLE AU - A Singh TI - Is the coprescription of β blockers and β<sub>2 </sub>agonists justified in COPD? DP - 2008 Nov 01 TA - Thorax PG - 1026--1026 VI - 63 IP - 11 4099 - http://thorax.bmj.com/content/63/11/1026.1.short 4100 - http://thorax.bmj.com/content/63/11/1026.1.full SO - Thorax2008 Nov 01; 63