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American College of Emergency Physicians Clinical Policies Subcommittee (Writing Committee) on Acute Headache:; Godwin SA, Cherkas DS, Panagos PD, Shih RD, Byyny R, Wolf SJ.American College of Emergency Physicians Clinical Policies Subcommittee (Writing Committee) on Acute Headache:, et al. Among authors: cherkas ds.Ann Emerg Med. 2019 Oct;74(4):e41-e74. doi: 10.1016/j.annemergmed.2019.07.009.Ann Emerg Med. 2019.PMID: 31543134