Headache and Pregnancy
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Cluster Headache:Pathogenesis,Diagnosis, and Management
Lancet 366:843-855, May,A., 2005
Neuroimaging in Presumed Primary Headache Disorders
Semin Neurol 17:373-382, Frishberg,B.M., 1997
Diagnosing the Severe Headache
Neurol 44:S6-S12, Dalessio,D.J., 1994