1. https://www.macmillan.org.uk/information-and-support/breast-cancer/treating/treatment-decisions/understanding-your-diagnosis/receptors-for-breast-cancer.html
2. https://www.wcrf.org/int/cancer-facts-figures/data-specific-cancers/breast-cancer-statistics
3. 4) Ekpo EU, Alakhras M, Brennan P. (2018). Errors in Mammography Cannot be Solved Through Technology Alone. Asian Pac J Cancer Prev., vol. 19(2):291-301
4. https://www.nhs.uk/conditions/breast-cancer-screening/results/
5. https://www.cancerresearchuk.org/about-cancer/cancer-symptoms/why-is-early-diagnosis-important