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Background
Fraction of exhaled nitric oxide (FeNO) is used for diagnosing and monitoring asthma in children, but the influence of allergic sensitization is still poorly understood. Here, we investigate how asthma and allergic sensitization influence FeNO levels during childhood.
Methods
We investigated the associations between asthma, aeroallergen sensitization, and FeNO measured from age 5–18...