Patients' Preference for Migraine Preventive TherapyF12Peres, M. F.Silberstein, S. D.Abraham, N. F.Gebeline-Myers, C.Author information1IIEP- Albert Einstein, Sao Paulo Headache Center, Sao Paulo, SP, Brazil2Jefferson Headache Center, Philadelphia, PA, USAHeadache 45(6):p 781, June 2005.Copyright © 2005 Blackwell Publishing Ltd.