Patterns of use of peripheral nerve blocks and trigger point injections among headache practitioners in the USA: Results of the American Headache Society Interventional Procedure Survey (AHS-IPS).

Blumenfeld A, Ashkenazi A, Grosberg B, Napchan U, Narouze S, Nett B, DePalma T, Rosenthal B, Tepper S, Lipton RB. Patterns of use of peripheral nerve blocks and trigger point injections among headache practitioners in the USA: Results of the American Headache Society Interventional Procedure Survey (AHS-IPS). Headache. 2010 Jun; 50(6):937-42.

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