Disorders of the Nervous System Caused by Drugs, Toxins, and Chemical Agents, Opiates and Synthetic Analgesic Drugs
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Opioids Versus Antidepressants in Postherpetic Neuralgia
Neurol 59:1015-1021, Raja,S.N.,et al, 2002
Diagnosis and Management of Migraine
BMJ 312:1279-1283, Goadsby,P.J.&Olesen,J., 1996
Headaches in Pregnancy
Semin Neurol 8:187-192, Reik,L., 1988