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The Journal of Headache and Pain volume 1, pages 133–134 (2000)
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, . On the web. J Headache Pain 1, 133–134 (2000). https://doiorg.publicaciones.saludcastillayleon.es/10.1007/PL00021710
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DOI: https://doiorg.publicaciones.saludcastillayleon.es/10.1007/PL00021710