1. Exodus 10:21–29.
2. Available at: https://www.govtrack.us/congress/bills/109/hr1020/text/ih. Accessed April 1, 2016.
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4. A nation in pain;Foreman,2014
5. A Blueprint for Transforming Prevention, Care, Education, and Research. Institute of Medicine (US) Committee on Advancing Pain Research, Care, and Education;Relieving Pain in America,2011