Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleContingent Negative Variation in Migraine.AuthorsBöcker, K.B.E.; Timsit-Berthier, M.; Schoenen, J.; Brunia, C.H.M.PublicationHeadache: The Journal of Head & Face Pain, 1990, Vol 30, Issue 9, p604ISSN0017-8748Publication typeArticleDOI10.1111/j.1526-4610.1990.hed3009604.x