No abstract available
MeSH terms
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Adolescent
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Chronic Disease / drug therapy
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Chronic Disease / epidemiology
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Cohort Studies
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Disease Progression
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Follow-Up Studies
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Headache / diagnosis
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Headache / drug therapy
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Headache / epidemiology*
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Humans
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Migraine Disorders / diagnosis
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Migraine Disorders / drug therapy
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Migraine Disorders / epidemiology*
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Prognosis
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Time Factors