The goal of this clinical trial is to learn if drug ABC works to treat severe asthma in adults. It will also learn about the safety of drug ABC. The main questions it aims to answer are: Does Transcranial Magnetic Stimulation lower the number of attacks per week in patients with refractory cluster headache ? Researchers will compare transcranial magnetic stimlation to a sham stimulation (a look-alike stimulation) to see if it works to prevent attacks of cluster headache. Participants will: Recieve stimulation for 10 minutes for 10 consecutive working days in 2 periods of time, separated by a 1 month washout period. Visit the clinic for each treatment day. Keep a diary of their symptoms and the number of times they use a rescue medication
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Reduction in number of attacks per week
Timeframe: From enrollment to the end to follow up period, at 3 months after last treatment period (week 8)