Recent thesis (end 2013) Infiltration of the greater occipital nerve as a treatment for the cluster headache: anatomy, pathophysiology and therapeutic trials.
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Thesis (2012) over Clusterheadache.
Read it!

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Information for headache sufferers:
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Here links to some articles of interest.

• International Classification of Headache Disorders (3rd edition - beta version) []
• Encyclopédie Médico-Chirurgicale 17-023-A-70 (2003) - H Massiou []
• Neurostimulation dans le Cluster Headache []
• OMS - Céphalées []
• WHO - Headache disorders []