References

Cancer information / Cancer 101 / What is cancer?

American Cancer Society. (2015, December 8). What Is Cancer? A Guide for Patients and Families. Retrieved from: http://www.cancer.org/cancer/cancerbasics/what-is-cancer.

American Society of Clinical Oncology. (2015, July). What is Cancer?. Retrieved from: http://www.cancer.net/navigating-cancer-care/cancer-basics/what-cancer.

National Cancer Institute. (2015, February 9). What Is Cancer?. Retrieved from: https://www.cancer.gov/about-cancer/understanding/what-is-cancer.

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