The function of the alula in avian flight.

Sci Rep · 2015 · PMC4423427 · PMID 25951056

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marginally non-significantno p-value reported

Although the lift enhancement was marginally non-significant in KS20, the trend remained the same and the opposite pattern was never observed.

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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.