The burden of asthma, hay fever and eczema in children in 25 countries: GAN Phase I study.

Eur Respir J · 2022 · PMC9474895 · PMID 35144987

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a clear trendno p-value reported

As in ISAAC Phase III [ 5 , 24 ], there was a clear trend of asthma symptoms and severity running in parallel in both age groups.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.