1. Epidemiology of headache in a general population-a prevalence study. J7 Clin;Rasmussen, B.K.; Jensen, R.; Schroll, M.; Olesen, J.;Epidemiol,1991
2. Headache Classification Committee of the International Headache Society. Classification and diagnostic criteria for headache disorders, cranial neuralgias and facial pain;Cephalalgia,1988
3. Prevalence of migraine and cluster headache in Swedish men of 18;Ekbom, K.; Ahlborg, B.; Schele, R.;Headache,1978
4. Epidemiology of headache and migraine in women;Waters, W.E.; O'Connor, P.J.;J Neurol Neurosurg Psychiatry,1971
5. A survey of headache in an English City. Res Clin Stud Headache;Newland, C.A.; Illis, L.S.; Robinson, P.K.; Batchelor, B.G.; Waters, W.E.,1978