1. Ghyasvand R. Epidemiology of breast cancer. Cancer Research Center Cancer Institute of IR Iran.2-18.
2. Walentowicz-Sadłecka M, Sadłecki P, Walentowicz P, Grabiec M. The role of vitamin D in the carcinogenesis of breast and ovarian cancer. Ginekologia polska 2013;84(4):305-8.
3. Oh E-Y, Ansell C, Nawaz H, Yang C-H, Wood PA, Hrushesky WJ. Global breast cancer seasonality. Breast cancer research and treatment 2010;123(1):233-43.
4. Kulie T, Groff A, Redmer J, Hounshell J, Schrager S. Vitamin D: an evidence-based review. The Journal of the American Board of Family Medicine 2009;22(6):698-706.
6. Holick, M, Chen TC. Vitamin D deficiency: a world-wide problem with health consequences. American Journal of Clinical Nutrition 2008; 87: 7.
7. Holick MF,Vitamin D: importanceinthe prevention of cancers, type 1 diabetes, heart disease, and osteoporosis.AmJClinNutr 2004; 79(3): 362-71.
8. Hernan MA, Olek MJ, Ascherio A. Geographic variation of MS incidence in two prospective studies of US women. Neurology 1999; 53(8): 1711-8.
9. Holick MF.Sunlightand vitamin D for bone health and prevention of auto immune dis-eases,cancers, and cardiovascular disease. Am J Clin Nutr 2004; 80: 11.
10. Heshmat R, Mohammad K, Majdzadeh SR, Forouzanfar MH, Bahrami A, Ranjbar GH, Omrani N, Rajabian R, Hossein-Nezhad A, Rezaei Hemami M, Keshtkar AA, Pajouhi M, Larijani B. Vitamin D Deficiency in Iran: A Multi-center Study among Different Urban Areas. Iranian J Publ Health 2010; 39(3): 45-52.
11. Mithal A, Wahl DA, Bonjour JP, Burckhardt P, Dawson-Hughes B, Eisman JA, et al. Committee of Scientific Advisors (CSA) Nutri-tion Working Group. Global vitamin D status and determinants of hypovitaminosis D. Os-teoporos Int 2009; 20(11):1807-2019.
12. Aghajani H, et al. Iranian Annual of National Cancer Registration Report. IRI Ministry of Health and Medical Education Health and Treatment Deputy Tehran: Tandis; 2008-2009.
14. Saeedi Nia A, Larijani B, Jalali Nia SH. Investigate the prevalence of vitamin D deficiency in Iranian population living inthe Islamic Republic of Iran to the breakdown provinces in the period 1990 to 2010. Iranian Journal of Diabetes and Lipid disorders 2013;12(6):574-84. [Persian].
15. Grant WB. An ecological study of cancer incidence and mortality rates in France with respect to latitude, anindex for vitamin D production. Dermatoendocrinol 2010;2(2):62-7.
16. Stephanie L H, Keels S J, Kristine M T. Breast cancer survivo rs and vitamin D: A review. Nutrition 2010;26(3):255-62.
17. Borisenkov MF. Latitude of residence and position in time zone are predictors of cancer incidence, cancer mortality, and life expectancy at birth. Chronobiol Int 2011; 28(2):155-62.
18. Holick MF. Vitamin D and sunlight: strategies for cancer prevention and other health benefits. Clin J Am Soc of Nephrol 2008;3(5):1548-54.
19. Yousef FM, Jacobs ET, Kang PT, Hakim IA, Going S, Yousef JM, et al. Vitamin D status and breast cancer in Saudi Arabian women: case-control study. The American journal of clinical nutrition 2013; 98(1):105-10.
20. van der Rhee H, Coomans C, van de Velde P, Coebergh J, de Vries E. Illness, health and sunlight. Nederlands tijdschrift voor geneeskunde 2012;157(46):A6612-.
21. Engel LS, Satagopan J, Sima CS, Orlow I, Mujumdar U, Coble J, et al. Sun Exposure, Vitamin D Receptor Genetic Variants, and Risk of Breast Cancer in the Agricultural Health Study. Environ Health Perspect 2014; 12(2):165-71.
22. Erren TC, Koch MS, Gross JV, Reiter RJ, Meyer-Rochow VB. A possible role of perinatal light in mood disorders and internal cancers: reconciliation of instability and latitude concepts. Neuro Endocrinol Lett 2012; 33(3):314-7.
23. Wu S-H, Ho SC, So E, Lam T-p, Woo J, Yuen P, et al. Sunlight Exposure and Breast Density: A Population-Based Study. Journal of breast cancer 2013;16(2):171-7.