Keywords asthma;nitric oxide;cyclic adenosine monophosphate;cyclic guanosine monophosphate;cyclic adenosine monophosphate/cyclic guanosine monophosphate ratio;

• 关键词哮喘;一氧化氮;环磷酸腺苷;环磷酸鸟苷;环磷酸腺苷/环磷酸鸟苷比值;