Poaceae pollen in the air depending on the thermal conditions.

Int J Biometeorol · 2014 · PMC4077247 · PMID 23793956

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an evident trendno p-value reported

Spieksma and Nikkels ( 1998 ) reported an evident trend to the earlier grass pollen season start date (6th of May, on average) on the basis of a 26-year observation in Leiden (the Netherlands).

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