方法：在欧洲社区呼吸健康调查(1991 ~ 1993)研究中，对638名哮喘患者(20 ~44岁)进行队列研究，随访期从1998 ~ 2002年。

METHODS: an international cohort of 638 subjects with asthma (20-44 years old) was identified in the European Community Respiratory Health Survey (1991-1993) and followed up from 1998 to 2002.

youdao

方法：在欧洲社区呼吸健康调查(1991 ~ 1993)研究中，对638名哮喘患者(20 ~44岁)进行队列研究，随访期从1998 ~ 2002年。

METHODS: an international cohort of 638 subjects with asthma (20-44 years old) was identified in the European Community Respiratory Health Survey (1991-1993) and followed up from 1998 to 2002.

youdao