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In short photoperiods, human sleep is biphasic.

Study design not specified in the source record · J Sleep Res · 1992. Source record refreshed; an explanation has not been reviewed.

Study design not specified in the source recordSource: PubMed · PMID 10607034

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In short photoperiods, human sleep is biphasic.

Wehr TA
J Sleep Res · 1992

PubMed ID
10607034
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