PT - JOURNAL ARTICLE AU - Shelley R. Salpeter TI - Rebuttal: Should we avoid β-agonists for moderate and severe chronic obstructive pulmonary disease? DP - 2007 Sep 01 TA - Canadian Family Physician PG - 1429--1430 VI - 53 IP - 9 4099 - http://www.cfp.ca/content/53/9/1429.1.short 4100 - http://www.cfp.ca/content/53/9/1429.1.full SO - Can Fam Physician2007 Sep 01; 53