Peripheral nerve blocks and trigger point injections in headache management - a systematic review and suggestions for future research.

Ashkenazi A, Blumenfeld A, Napchan U, Narouze S, Grosberg B, Nett R, DePalma T, Rosenthal B, Tepper S, Lipton RB. Peripheral nerve blocks and trigger point injections in headache management - a systematic review and suggestions for future research. Headache. 2010 Jun; 50(6):943-52.

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