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Genovese, A., Taga, A., Rausa, F. et al. Clinical features of cluster headache in relation to age of onset: results from a retrospective study of a large case series. Neurol Sci 40 (Suppl 1), 193–194 (2019). https://doi.org/10.1007/s10072-019-03801-x
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DOI: https://doi.org/10.1007/s10072-019-03801-x