1. Developing the health care workforce of the future for North Carolina;Abernathy;North Carolina Medical Journal,2019
2. Instrumental variables in action: Sometimes you get what you need;Angrist,2009
3. Regional variation in primary care involvement at the end of life;Ankuda;Annals of Family Medicine,2017
4. Appalachian Regional Commission. (2021). Appalachian counties served by ARC. Retrieved from https://www.arc.gov/appalachian-counties-served-by-arc/
5. Appalachian Rural Commission. (2022). About the Appalachian region. Retrieved from https://www.arc.gov/about-the-appalachian-region/