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Tension Headache (cont.)

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American Academy of Neurology

American Council for Headache Education

American Headache Society

International Headache Society

Mayday Pain Project

National Headache Foundation

National Institute of Neurological Disorders and Stroke

Neurology Channel

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Headache, Tension »

The International Headache Society (IHS) began developing a classification system for headaches in 1985.

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