(Q45403838)
Statements
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Time trends in sleep-onset difficulties among Norwegian adolescents: 1983--2005. (English)
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Ståle Pallesen
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Inger Hilde Nordhus
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Jørn Hetland
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Oddrun Samdal
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1 November 2008
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36
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8
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889-895
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Identifiers
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