Botulinum neurotoxin type A in the preventive treatment of refractory headache: a review of 100 consecutive cases.

Tepper SJ, Bigal ME, Sheftell FD, Rapoport AM. Botulinum neurotoxin type A in the preventive treatment of refractory headache: a review of 100 consecutive cases. Headache. 2004 Sep; 44(8):794-800.

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