An overview of the trigeminal autonomic cephalalgias based on the duration and frequency of attacks. SUNCT/SUNA = Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing/short-lasting unilateral neuralgiform headache attacks with cranial autonomic features, PH = Paroxysmal hemicrania, CH = Cluster headache, HC = Hemicrania continua | Wei, D. Y., Yuan Ong, J. J., & Goadsby, P. J. (2018). Overview of Trigeminal Autonomic Cephalalgias: Nosologic Evolution, Diagnosis, and Management. Annals of Indian Academy of Neurology, 21(Suppl 1), S39–S44. doi:10.4103/aian.AIAN_348_17

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