Authors: Evers, S Gralow, I Bauer, B Suhr, B Buchheister, A Husstedt, IW Ringelstein, EB

Citation: S. Evers et al., Sumatriptan and ergotamine overuse and drug-induced headache: A clinicoepidemiologic study, CLIN NEUROP, 22(4), 1999, pp. 201-206