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Olesen J, Steiner TJ. The International classification of headache disorders, 2nd edn (ICDH-II). J Neurol Neurosurg Psychiatry. 2004;75(6):808-11doi: 10.1136/jnnp.2003.031286.
Olesen, J., & Steiner, T. J. (2004). The International classification of headache disorders, 2nd edn (ICDH-II). Journal of neurology, neurosurgery, and psychiatry, 75(6), 808-11. https://doi.org/10.1136/jnnp.2003.031286
Olesen, J, and Steiner, T J. "The International classification of headache disorders, 2nd edn (ICDH-II)." Journal of neurology, neurosurgery, and psychiatry vol. 75,6 (2004): 808-11. doi: https://doi.org/10.1136/jnnp.2003.031286
Olesen J, Steiner TJ. The International classification of headache disorders, 2nd edn (ICDH-II). J Neurol Neurosurg Psychiatry. 2004 Jun;75(6):808-11. doi: 10.1136/jnnp.2003.031286. PMID: 15145989; PMCID: PMC1739053.
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