Figure 2.

Forearm blood flow (FBF) response to sodium nitroprusside (A) and substance P (B) in migraine patients (closed circles) and control subjects (open circles). P < 0.001 for all responses.

Vanmolkot and de Hoon BMC Neurology 2010 10:119   doi:10.1186/1471-2377-10-119
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