http://www.who.int/features/qa/cancer-red-meat/en/
https://www.cancer.org/latest-news/world-health-organization-says-processed-meat-causes-cancer.html
https://www.independent.co.uk/news/uk/home-news/who-cancer-report-bacon-sausages-and-other-processed-meats-cause-cancer-a6708991.html
http://www.bbc.com/news/health-34615621