The subjects with asthma underwent parallel measurements of exhaled nitric oxide, sputum eosinophil percentage and exhaled breath condensate pH.

• 并允许对提示条件和通气模式精确控制.；哮喘受试者进行测量呼出的一氧化氮；痰液嗜酸性细胞百分比和呼出气冷凝液pH值。