吸入激素联合缓释茶碱与β2-受体激动剂治疗儿童哮喘比较
흡입격소연합완석다감여β2-수체격동제치료인동효천비교
Comparative study on therapeutic effect and safety of inhaled corticosteroid combined with theophylline or with long-acting β2 agonist in the control of children asthma
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