TY - JOUR T1 - Prophylaxis of migraine headache JF - Canadian Medical Association Journal JO - CMAJ SP - E269 LP - E276 DO - 10.1503/cmaj.081657 VL - 182 IS - 7 AU - Tamara Pringsheim AU - W. Jeptha Davenport AU - Werner J. Becker Y1 - 2010/04/20 UR - http://www.cmaj.ca/content/182/7/E269.abstract ER -