00542nas a2200193   4500000000100000008004100001653001100042653002400053653004300077653003200120100001500152700001800167700002000185700002000205245009000225300001200315490000700327022001400334       2018                            d10aHumans10aDisease Progression10aPulmonary Disease, Chronic Obstructive10aAdrenergic beta-Antagonists1 aJenkins C.1 aHancox Robert1 aChang Catherina1 aBeasley Richard00aStarting beta-blockers during exacerbations of chronic obstructive pulmonary disease.  a227-2280 v48  a1445-5994