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Wei, D. Y., Khalil, M., & Goadsby, P. J. (2019). Managing cluster headache. Practical Neurology, practneurol-2018. doi:10.1136/practneurol-2018-002124
Derry, CJ; Derry, S; Moore, RA (2014). "Sumatriptan (all routes of administration) for acute migraine attacks in adults - overview of Cochrane reviews". The Cochrane Database of Systematic Reviews, 28 May 2014. 5 (5): CD009108. doi:10.1002/14651858.CD009108.pub2. PMID24865446.