1. Ferlay J, Soerjomataram I, Ervik M, Dikshit R, Eser S, Mathers C, Rebelo M, Parkin DM, Forman D, Bray F (2013) Cancer incidence and mortality worldwide: IARC cancer base no. 11.
http://globocan.iarc.fr
. Accessed 6 March 2017
2. Engholm G, Ferlay J, Christensen N, Hansen HL, Hertzum-Larsen R, Johannesen TB, Kejs AMT, Khan S, Ólafsdóttir E, Petersen T, Schmidt LKH, Virtanen A, Storm HH (2017) Cancer incidence, mortality, prevalence and survival in the Nordic countries, version 8.0.
http://www.ancr.nu
. Accessed 27 Dec 2017
3. Ma H, Bernstein L, Pike MC, Ursin G (2006) Reproductive factors and breast cancer risk according to joint estrogen and progesterone receptor status: a meta-analysis of epidemiological studies. Breast Cancer Res 8(4):R43.
https://doi.org/10.1186/bcr1525
4. Key TJ, Verkasalo PK, Banks E (2001) Epidemiology of breast cancer. Lancet Oncol 2(3):133–140
5. Weiderpass E, Meo M, Vainio H (2011) Risk factors for breast cancer, including occupational exposures. Saf Health Work 2(1):1–8.
https://doi.org/10.5491/SHAW.2011.2.1.1