1.Menken, M, Munsat, TL, Toole, JF.The global burden of disease study implications for neurology. Arch Neurol. 2000; 57: 418–20.
2.Osuntokun, BO, Adeuja, AO, Nottidge, VA, Bademosi, O, Alumide, AO, Ige, O, et al.Prevalence of headache and migrainous headache among Nigerian Africans: a community-based study. East Afr Med J. 1992; 69(4): 196–9.
3.Stewart, WF, Lipton, RB, Celentano, DD, Reed, MI.Prevalence of migraine headache in the United States: relation to age, income, race and other sociodemographic factors. JAMA. 1992; 267: 64–9.
4.Rasmussen, BK, Olesen, J.Symptomatic and nonsymptomatic headaches in a general population. Neurology. 1992; 42: 1225–31.
5.Steiner, TJ, Stewart, WF, Kolodner, K, Liberman, J, Lipton, RB.Epidemiology of migraine in England. Cephalalgia. 1999; 19: 3305–6. [abstract].
6.Pryse-Phillips, W, Findlay, H, Tugwell, P, Edmeads, J, Murray, TJ, Nelson, RF.A Canadian population survey on the clinical, epidemiologic and societal impact of migraine and tension-type headache. Can J Neurol Sci. 1992; 19 (3): 333–9.
7.Mitsikostas, DD, Gatzonis, S, Thomas, A, Kalfakis, N, Ilias, A, Papageoergiou, C.An epidemiological study of headaches among medical students in Athens. Headache. 1996; 36: 561–4.
8.Sanvito, WL, Monzillo, PH, Peres, MF, Martinelli, MO, Fera, MP, Gouveia, DA, et al.The epidemiology of migraine in medical students. Headache. 1996; 36: 316–9.
9.Lipton, RB, Stewart, WF, Stone, AM, Lainez, MJA, Sawyer, JPC.Stratified care versus step care strategies for migraine. JAMA. 2000; 284: 2599–605.
10.Lipton, RB, Silberstein, SD.The role of headache-related disability in migraine management: implications for headache treatment guidelines. Neurology. 2001; 56: 35–42.
11.Oluwole, S, Bwala, SA, Nwabueze, AC, Davies, AO.Effectiveness of sumatriptan for acute treatment of migraine headache in an African population. Afr J Neurol Sci. 2003; 22(2). Available from: http://www.ajol.info. [cited 2008 Jan 7]. http://www.ajol.info
12.World Health Organization Teaching Statistics. In: Lwanga, SK, Tye, CY, editors. Twenty lessons and seminar outlines. Geneva WHO. 1986. p. 67–74.
13.Ogunyemi, AO.Prevalence of headache among Nigerian university students. Headache. 1984; 24: 127–30.
14.Headache Classification Committee of the International Headache Society. The international classification of headache disorders. (2nd ed.). Cephalalgia. 2004; 24 suppl 1: 1–160.
15.Stewart, WF, Lipton, RB, Kolodner, K, Liberman, J, Sawyer, J.Reliability of the Migraine Disability Assessment score in a population-based sample of headache sufferers. Cephalalgia. 1999; 19: 107–14.
16.Bener, A.Frequency of headache and migraine in Qatar. Neuro-epidemiology. 2006; 27(2): 61–6.
17.Deleu, D, Khan, MA, Humaidan, H, Al Mantheri, Z, Al Hashami, S.Prevalence and clinical characteristics of headache in medical students in Oman. Headache. 2001; 41 (8): 798–804.
18.Demirkirkan, MK, Ellidokuz, H, Boluk, A.Prevalence and clinical characteristics of migraine in university students in Turkey. Tohoku J Exp Med. 2006; 208: 87–92.
19.O’Brien, B, Goeree, R, Streiner, D.Prevalence of migraine headache in Canada: a population-based survey. Int J Epidemiol. 1994; 23 (5): 1020–6.
20.Ad Hoc Committee: Classification of Headache. JAMA. 1962; 179: 717–18.
21.MacGregor, EA, Brandes, J, Eikermann, A.Migraine prevalence and treatment patterns: the global migraine and zolmitriptan evaluation survey. Headache. 2003; 43: 19–26.
22.Jelinski, SE, Becker, WJ, Christie, SN, Giammarco, R, Mackie, GF, Gawel, MJ, et al.Clinical features and pharmacological treatment of migraine patients referred to headache specialists in Canada. Cephalalgia. 2005; 26: 578–88.