Headache Classification Committee of the International Headache Society. Classification and Diagnostic Criteria for Headache Disorders, Cranial Neuralgias and Facial Pain. Cephalalgia 1988; 8(suppl 7): l-96.
2.
MathewNT, StubitsE, NigamMPTrans for nation of episodic migraine into daily headaches: an analysis of factors.Headache1982; 22: 66–68.