1. National Cancer Institute. Lung cancer. 2014. Available from: http://www.cancer.gov/cancertopics/types/lung
2. National Cancer Institute, NIH, DHHS. Cancer trends progress report. Bethesda. 2019. Available from: https://progressreport.cancer.gov
3. U.S. Cancer Statistics Working Group. U.S. cancer statistics data visualizations tool. 2019. Available from: www.cdc.gov/cancer/dataviz
4. U.S. Department of Health and Human Services. The Health Consequences of Involuntary Exposure to Tobacco Smoke: A Report of the Surgeon General. Atlanta, GA: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, Coordinating Center for Health Promotion, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health, 2006. https://www.ncbi.nlm.nih.gov/books/NBK44324/
5. Wang TW, Asman K, Gentzke AS, et al. Tobacco product use among adults – United States, 2017. MMWR Morb Mortal Wkly Rep. 2018;67:1225–32.