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Table 2 Chronic cluster headache

From: The HortONS study. Treatment of chronic cluster headache with transcutaneous electrical nerve stimulation and occipital nerve stimulation: study protocol for a prospective, investigator-initiated, double-blinded, randomized, placebo-controlled trial

A. Attacks fulfilling criteria A-E for Cluster headache, and criterion B below

B. Occurring without a remission period, or with remissions lasting < 3 months, for at least one year

  1. ICHD-3 International classification of headache disorders 3rd edition
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BMC Neurology

ISSN: 1471-2377

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