Open Access Published: November 2001 Letter Peter Hallas1 The Journal of Headache and Pain volume 2, page100(2001)Cite this article 369 Accesses Metrics details Author informationAffiliationsHojdevangs Alle 9, 2, 2300 Copenhagen S. Denmark e-mail: Hallas@rocketmail.com Tel.: +45-32-848121 Fax: +45-36-474979, DKPeter HallasAuthorsSearch for Peter Hallas in:PubMed • Google Scholar Rights and permissionsReprints and PermissionsAbout this articleCite this articleHallas, P. Letter. J Headache Pain 2, 100 (2001). https://doi.org/10.1007/s101940170036Download citationIssue Date: November 2001DOI: https://doi.org/10.1007/s101940170036 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.