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Treatments for Headache
Headache—frequently asked questions. National Headache Foundation website. Available at:
http://www.headaches.org/headache-faq. Accessed November 7, 2012.
NINDS headache information page. National Institute of Neurological Disorders and Stroke
website. Available at:
http://www.ninds.nih.gov/disorders/headache/headache.htm. Updated September 2012. Accessed November 7, 2012.
International classification of headache disorders. 2nd ed.
International classification of headache disorders. 2nd ed. (1st revision.)