(Q51816387)
Statements
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Case-control studies on risk factors for chronic obstructive pulmonary disease: how does the sampling of the cases and controls affect the results? (English)
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Inga-Cecilie Sørheim
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Thomas Blix Grydeland
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Ernst Reidar Omenaas
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Amund Gulsvik
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Per Sigvald Bakke
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1 April 2010
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4
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89-96
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2
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Identifiers
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