Methods The mice were administerted with aerosol inhalation of bleomycin (BLM) or by the trachea, and were sacrificed after treatment on days 7, 14 and 28, respectively, and their lungs were harvested for histological studies.

• 方法 将雾化吸入不同剂量博莱霉素处理的小鼠及进行气管给药的小鼠 ,分别于 7、14、2 8d处死后 ,取其肺叶制备病理切片 ,染色后镜检。