123 Continuous combined oral contraceptive use versus vitamin E in the treatment of menstrual migraine: rationale and protocol of a randomized controlled trial (WHAT!) Britt W.H. van der Arend1,2#, Daphne S. van Casteren1#, Iris E. Verhagen1,2, Antoinette MaassenVanDenBrink2* & Gisela M. Terwindt1* Affliations: 1Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands 2Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands #Shared first author *Shared last author Trials 2024;25:123.
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