• 1. CVA Index: 现金增加值指数

• 1.Conclusion: IOS can reflect pulmonary function in children with cough variance asthma. IOS was the sensitive index for diagnosis children with CVA.
  结论：IOS技术适用于幼儿肺功能检测并可用于支气管舒张试验，是辅助诊断咳嗽变异性哮喘的检测指标之一。
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