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机译:Asthma-COPD overlap syndrome showed more exacerbations however lower mortality than COPD
Tongji Univ, Sch Med, Shanghai Pulm Hosp, Dept Resp Med, 507 Zhengmin Rd, Shanghai 200433, Peoples;
Tongji Univ, Sch Med, Shanghai Pulm Hosp, Dept Pulm Funct Test, 507 Zhengmin Rd, Shanghai 200433;