1. 1. World health organization WHO [internet]. [cited 2018 Feb 10]. Available from: http://www.who.int/cancer/prevention/diagnosis-screening/breast-cancer/en/
2. 2. Al-Shahrani Z, Al-Rawaji A, Al-Madouj AN, Hayder MS, Al-Zahrani A, Al-Mutlaq H, et al. Cancer Incidence Report Saudi Arabia 2014. Saudi Cancer Regist. 2017:1-81. Available from: http://www.chs.gov.sa/ar/HealthCenters/NCC/CancerRegistry/CancerRegistryReports/2014.pdf
3. 3. Saggu S, Rehman H, Abbas ZK, Ansari AA. Recent incidence and descriptive epidemiological survey of breast cancer in Saudi Arabia. Saudi Med J. 2015;36(10):1176-80.
4. 4. John Hopkins medicine [Internet]. [cited 2018 Feb 10]. Available from: https://www.hopkinsmedicine.org/healthlibrary/conditions/adult/breast_health/risk_factors_for_breast_cancer_85,P00160
5. 5. McPhearson K, Steel C, Dixon J. Breast cancer-epidemiology, risk factors and genetics. Brit Med J. 2000;321(7261):624-8.