References

Cancer information / Cancer types / Lung / Risks / Reducing your risk

American Cancer Society. (2016, May 16). Non-small cell lung cancer risk factors. Retrieved from: http://www.cancer.org/cancer/lungcancer-non-smallcell/detailedguide/non-small-cell-lung-cancer-risk-factors.

National Cancer Institute. (2016, February 11). Lung Cancer Prevention (PDQ®)–Health Professional Version. Retrieved from: http://www.cancer.gov/types/lung/hp/lung-prevention-pdq.

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