Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDr. Olsen replies.PublicationHeadache: The Journal of Head & Face Pain, 1990, Vol 30, Issue 11, p741ISSN0017-8748Publication typeArticleDOI10.1111/j.1526-4610.1990.hed3011741b.x