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Evaluation of Headache

Prevalence. 31-74% of Americans have episodic tension-type HA each year12-16% of North Americans and Europeans have migraine HAs0.1% of population has Cluster HAs . Societal Impact. In addition to the affected individual's quality of life, a 1993 survey revealed a larger cost of HAs:150 million lost work days each year in US329,000 lost school days annually.

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Evaluation of Headache

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