OnabotulinumtoxinA blockade of the sphenopalatine ganglion in treatment-resistant chronic migraine (MiBlock): rationale, design and study protocol for a multi-centre, investigator initiated, randomised, quadruple-blinded placebo-controlled trial
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Background: Treatment-resistant chronic migraine patients constitute a heavily burdened patient population with need for novel treatment options. The sphenopalatine ganglion (SPG), located deep within the facial structures, is a ... ...
