Methods Bronchial biopsies and bronchoalveolar lavage ( BAL) were performed on 12 asthmatic patients and 10 control subjects with fibreoptic bronchoscopy.

• 方法：支气管哮喘患者12例及正常志愿者10例，行纤支镜支气管粘膜活检及肺泡灌洗（BAL）；