Table 1.
Demographics of the sample
| All patients (n = 20) | |
|---|---|
| Number of females/males | 15/5 |
| Mean age, years ± SD (range) | 44.8 ± 13.0 (24–68) |
| Number of Caucasians | 20/20 |
| Primary headache | 20/20 |
| • Chronic cluster headache | 10/20 |
| • Chronic migraine | 10/20 |
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