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Resources:
1 The International Headache Society. "International Classification of Headache Disorders, 2nd Edition." Cephalalgia, Volume 24 Issue s1. May, 2004. doi:10.1111/j.1468-2982.2003.00823.x.
2 Young, William B., MD; Silberstein, Stephen D., MD. "Migraine and Other Headaches." AAN Press. St. Paul. 2004.
3 Calhoun, Anne H., MD; Ford, Sutapa, PhD; Millen, Cori, DO; Finkel, Alan G., MD; Truong, Young, PhD; Nie, Yonghong, MS. "The Prevalence of Neck Pain in Migraine." Headache. Published Online: Jan. 20, 2010.
Medical review by John Claude Krusz, PhD, MD

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