“10 Facts about Cancer.” World Health Organization, World Health Organization, 12 Sept. 2018, www.who.int/features/factfiles/cancer/en/.
“9 Things You May Not Know about Cancer.” Roche, www.roche.com/research_and_development/what_we_are_working_on/oncology/9_things_cancer.htm.
“Cancer.” World Health Organization, World Health Organization, www.who.int/en/news-room/fact-sheets/detail/cancer.
“Cancer Facts and Statistics.” American Cancer Society, www.cancer.org/research/cancer-facts-statistics.html.