1. 1. Symvoulakis EK, Clark LV, Dowson AJ, Jones R, Ridsdale L. Headache: a ‘suitable case’ for behavioural treatment in primary care? British Journal of General Practice 2007; 57: 231-237. 2. Rasmussen BK, Jensen R, Schroll M, Olesen J. Epidemiology of headache in a general population – a prevalence study. Journal of Clinical Epidemiology 1991; 44: 1147-1157. 3. Hagen K, Zwart JA, Vatten L, Stovner LJ, Bovim G. Prevalence of migraine and non-migrainous headache- head-HUNT, a large population-based study. Cephalalgia 2000; 20: 900-906. 4. Roh JK, Kim JS, Ahn YO. Epidemiologic and clinical characteristics of migraine and tension-type headache in Korea. Headache 1998; 38: 356-365. 5. Boardman HF, Thomas E, Croft PR, Millson DS. Epidemiology of headache in an English district. Cephalalgia 2003; 23: 129-137. 6. Abu-Arafeh IA, Russell G. Epidemiology of headache and migraine in children. Developmental medicine and child neurology 1993; 35(4): 370-371. 7. Akyol A, Kiylioglu N, Aydin I et al. Epidemiology and clinical characteristics of mi-graine among school children in the Menderes region. Cephalalgia 2007; 27(7):781-7. 8. Al Jumah M, Awada A, Al Azzam S. Headache syndromes amongst schoolchildren in Riyadh, Saudi Arabia. Headache 2002; 42(4): 281-6. 9. Ando N, Fujimoto S, Ishikawa T et al. Prevalence and features of migraine in Japanese junior high school students aged 12-15 yr. Brain & Development 2007; 29(8): 482-5. 10. Barea LM, Tannhauser M, Rotta NT. An epidemiologic study of headache among children and adolescents of southern Brazil. Cephalalgia 1996;16:545- 549. 11. Karli N, Akgoz S, Zarifoglu M et al. Clinical characteristics of tension-type headache and migraine in adolescents: a student-based study. Headache 2006b; 46(3):399-412. 12. Ozge A, Bugdayci R, Sasmaz T. et al. The sensitivity and specificity of the case definition criteria in diagnosis of headache: a school-based epidemiological study of 5562 children in Mersin. Cephalalgia 2002; 22(10):791–8. 13. Zencir M, Ergin H, Sahiner T. et al. Epidemiology and symptomatology of migraine among school children: Denizli urban area in Turkey. Headache 2004; 44(8):780-5. 14. Karlı N, Akış N¸ Zarifoğlu M, Akgöz S, Irgil E, Ayvacıoğlu U, Çalışır N, Haran N, Akdoğan Ö. Headache Prevalence in Adolescents Aged 12 to 17: A Student-Based Epidemiological Study in Bursa. Headache 2006a; 46:649-655. 15. Ozge A, Sasmaz T, Cakmak SE et al. Epidemiological-Based Childhood Headache Natural History Study: After an Interval of Six Years. Cephalalgia 2010; 30(6):703-12. 16. Castillo J, Munoz P, Guitera V, Pascual J. Epidemiology of chronic daily headache in the general population. Headache 1999; 39: 190–6. 17. Scher AI, Stewart WF, Liberman J, Lipton RB. Prevalence of frequent headache in a population sample. Headache 1998; 38: 497–506. 18. Lanteri-Minet M, Auray JP, El Hasnaoui A, Dartigues JF, Duru G, Henry P et al. prevalence and description of chronic daily headache in the general population in France. Pain 2003; 102:143–9. 19. Lu SR, Fuh JL, Chen WT, Juang KD, Wang SJ. Chronic daily headache in Taipei, Taiwan: prevalence, follow-up and outcome predictors. Cephalalgia 2001; 21:980–6. 20. Scher AI, Stewart WF, Ricci JA, Lipton RB. Factors associated with the onset and remission of chronic daily headache in a population-based study. Pain 2003; 106:81–9. 21. Silberstein SD, Lipton RB. Epidemiology of migraine. Neuroepidemiology 1993; 12(3): 179–194. 22. Rasmussen BK. Epidemiology of headache. Cephalalgia 1995; 15(1): 45–68. 23. Rhee H. Prevalence and predictors of headaches in US adolescents. Headache 2000; 40: 528-538. 24. Raieli V, Raimondo D, Cammalleri R, Camarda R. Migraine headaches in adolescents: A student population-based study in Monreale. Cephalalgia 1995;15:5-12. 25. Ayatollahi SMT, Moradi F, Ayatollahi SAR. Prevalances of migraine and tension-type headache in adolescent girls of Shiraz (Southern Iran). Headache 2002; 42: 287-290. 26. Mavromichalis I, Anagnostopoulos D, Metaxas N, Papanastassiou E. Prevalence of migraine in schoolchildren and some clinical comparisons between migraine with and without aura. Headache 1999; 39:728-736. 27. Bugdayci R, Ozge A, Sasmaz T, Kurt A O, Kaleagasi H, Karakelle A, Tezcan H, Siva A. Prevalence and factors affecting headache in Turkish schoolchildren. Pediatrics International 2005; 47: 316–322. 28. Aytaçoğlu H, Özge A, Köstekçi İ, Taşdelen B, Öksüz N, Toros F. The Effects of Daily Variables on Primary Headache Disorders in High-School Children; A Proposal For A Cut-off Value For Study/Leisure Time Regarding Headache Types. Journal of Neurological Sciences 2011; 28(4): 453-464. 29. Zarifoglu M, Karli N, Taskapilioglu O. Can ID Migraine be used as a screening test for adolescent migraine? Cephalalgia 2008; 28(1): 65–71. 30. Martins IP, Parreira E. Behavioral Response to Headache: A Comparison Between Migraine and Tension-type Headache. Headache 2001;41: 546-553 31. Sweileh WM, Arafat RT. Attitudes Toward Medications: A pilot study in Palestine. The Islamic University Journal 2006; 14(2): 21-30. 32. Gaul C, Schmidt T, Czaja E, Eismann R, Zierz S. Attitudes towards complementary and alternative medicine in chronic pain syndromes: a questionnaire-based comparison between primary headache and low back pain. BMC Complementary and Alternative Medicine 2011; 11:89. 33. Gauthier JG, Ivers H, Carrier S. Nonpharmacological approaches in the management of recurrent headache disorders and their comparison and combination with pharmacotherapy. Clinical Psychology Review 1996; 16: 543–571. 34. Silberstein SD. Practice parameter: evidence-based guidelines for migraine headache (an evidence-based review). Report of the Quality Standards Subcommittee of the American Academy of Neurology. Neurology 2000; 55: 754–762.