Methods PCR was used to detect I/D gene polymorphisms of ACE in 149 children with asthma,108 children with wheezing pneumonia and 121 children with pneumonia.

• 方法对哮喘、喘憋性肺炎、肺炎三组的149、108、121例患儿,经PCR检测ACE基因I/D多态性分布;