We found a matchYour institution may have access to this item. Find your institution then sign in to continue.Title[Gordian knot: medication overuse headache].AuthorsKatsarava Z; Fritsche GPublicationSchmerz (Berlin, Germany), 2004, Vol 18, Issue 5, p421ISSN0932-433xPublication typearticleDOI10.1007/s00482-004-0355-x