TY - JOUR T1 -受体激动剂和哮喘研究:JO - Eur Respir J SP - 273lp - 278vl - 6 IS - 2 AU - Ernst, P AU - Spitzer, WO AU - Suissa, S AU - Cockroft, DW AU - Buist，AS Y1 - 1993/02/01 UR - //www.qdcxjkg.com/content/6/2/273.abstract N2 - 300 Multiple choice(多选题)this is a pdf only article and there is no markup to show you.全文。pdf ER -