Patterns of use of triptans and reasons for switching them in a tertiary care migraine population.
Sheftell FD, Feleppa M, Tepper SJ, Volcy M, Rapoport AM, Bigal ME. Patterns of use of triptans and reasons for switching them in a tertiary care migraine population. Headache. 2004 Jul-Aug; 44(7):661-8.