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. 2021 Jul 23;3(3):fcab169. doi: 10.1093/braincomms/fcab169

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© The Author(s) (2021). Published by Oxford University Press on behalf of the Guarantors of Brain.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Radiation and headache character. (A) Relative frequency distribution of radiation of pain. (B) Relative frequency distribution of headache character.