1. Seven takeaways from the new 2017 CVS health and express scripts formulary exclusion lists, August 3, 2016. Available from: https://www.drugchannels.net/2016/08/seven-takeaways-from-new-2017-cvs.html. Accessed February 21, 2019.

2. Kodjak A. Will your prescription meds be covered next year? Better check! Available from: http://www.npr.org/sections/health-shots/2016/08/15/489790412/will-your-prescription-meds-be-covered-next-year-better-check. Accessed February 21, 2019.

3. Impact of non-medical switching on clinical and economic outcomes, resource utilization and medication-taking behavior: a systematic literature review

4. Tennessee Patient Stability Coalition, Global Healthy Living Foundation. Tennessee patient sentiment toward non-medical drug switching; February 2016. Available from: https://creakyjoints.org/wp-content/uploads/2018/10/GHLF-Tennessee_Patient_Sentiment.pdf. Accessed February 21, 2019.