1. Department of Health and Human Services Key features of the Affordable Care Act by year http://www.hhs.gov/healthcare/facts-and-features/key-features-of-aca-by-year/index.html#2014 2016
2. Centers for Medicare and Medicaid Services Medicaid enrollment data collected through MBES https://www.medicaid.gov/medicaid-chip-program-information/program-information/medicaid-and-chip-enrollment-data/medicaid-enrollment-data-collected-through-mbes.html 2016
3. The Henry J. Kaiser Family Foundation Status of state action on the Medicaid expansion decision http://kff.org/health-reform/state-indicator/state-activity-around-expanding-medicaid-under-the-affordable-care-act 2016
4. Affordable Care Act Medicaid expansion reduced uninsured hospital stays in 2014;Nikpay;Health Aff (Millwood).,2016
5. State Medicaid expansion and changes in hospital volume according to payer;Hempstead;N Engl J Med.,2016