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The Journal of Headache and Pain > 2008 > 9 > 3 > 159-163
The Journal of Headache and Pain > 2007 > 8 > 4 > 217-223
The Journal of Headache and Pain > 2008 > 9 > 3 > 159-163
The Journal of Headache and Pain > 2007 > 8 > 4 > 217-223