Open Access Published: December 2000 On the web The Journal of Headache and Pain volume 1, page197(2000)Cite this article 214 Accesses Metrics details AuthorsSearch for in:PubMed • Google Scholar Rights and permissionsReprints and PermissionsAbout this articleCite this article, . On the web. J Headache Pain 1, 197 (2000). https://doi.org/10.1007/PL00021711Download citationIssue Date: December 2000DOI: https://doi.org/10.1007/PL00021711 Comments By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate. Please note that comments may be removed without notice if they are flagged by another user or do not comply with our community guidelines.