RCT: Safety and efficacy of occipital nerve stimulation for attack prevention in medically intractable chronic cluster headache.

Safety and efficacy of occipital nerve stimulation for attack prevention in medically intractable chronic cluster headache (ICON): a randomised, double-blind, multicentre, phase 3, electrical dose-controlled trial – The Lancet Neurology (link to abstract – $ for full-text)

Commentary: Nerve stimulation effective in patients with untreatable cluster headaches – Leiden University