(Q44503438)
Statements
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Prevalence of primary chronic headache in a population-based sample of 30- to 44-year-old persons. The Akershus study of chronic headache (English)
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Michael Bjørn Russell
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Ragnhild Berling Grande
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Kjersti Aaseth
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Pål Gulbrandsen
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Christofer Lundqvist
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14 February 2008
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Identifiers
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