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Neurol 44:S6-S12, Dalessio,D.J., 1994
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Brain 130:3091-3101, Ducros, A.,et al, 2007
Laughing Headache: A Novel Type of Triggered Headache with Response to Divalproex Sodium
Headache 43:801-803, Levin,M. &Ward,T.N., 2003
Yom Kippur Headache
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