1. National Center for Veterans Analysis and Statistics. VA utilization profile FY2017. Available from: https://www.va.gov/vetdata/docs/Quickfacts/VA_Utilization_Profile_2017.pdf. Accessed May 20, 2022.
2. Wang ZJ, Dhanireddy P, Prince C, Larsen M, Schimpf M, Pearman G. 2019 survey of veteran enrollees’ health and use of health care. Available from: https://www.va.gov/HEALTHPOLICYPLANNING/SOE2019/2019_Enrollee_Data_Findings_Report-March_2020_508_Compliant.pdf. Accessed May 20, 2022.
3. Percentage distribution of household income in the US in 2020. Available from: https://www.statista.com/statistics/203183/percentage-distribution-of-household-income-in-the-us/. Accessed May 20, 2022.
4. Current Cigarette Smoking Among Adults — United States, 2016
5. Increasing Prevalence of Chronic Lung Disease in Veterans of the Wars in Iraq and Afghanistan