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has major subject area list
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Headache Disorders; Primary Health Care; Severity of Illness Index
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information resource reference
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Coeytaux RR, Linville JC. Chronic daily headache in a primary care population: prevalence and headache impact test scores. Headache. 2007 Jan; 47(1):7-12.
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label
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Chronic daily headache in a primary care population: prevalence and headache impact test scores.
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