The grass pollen season 2015: a proof of concept multi-approach study in three different European cities.

World Allergy Organ J · 2017 · PMC5594510 · PMID 28932345

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highly significantno p-value reported

The analysis of variance presented highly significant p -values for several grass species compared to symptom data, pollen data or both.

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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.