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Showing articles 0 to 4 of 4 Filter Applied: headache,severe (Click to remove) Migraine NEJM 377:553-561, Charles, A., 2017 A 63-Year-Old Man With Headaches and Behavioral Deterioration Neurol 68:782-787, Greenberg,S.M.,et al, 2007 Behavior During a Cluster Headache Lancet 342:723-725, Blau,J.N., 1993 Clinicopath Conf, Herpes Simplex Encephalitis Am J Med 93:327-334, Krogstad,D., 1992 Showing articles 0 to 4 of 4