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https://www.ethics.va.gov/docs/integratedethics/ec_primer_2nd_ed_080515.pdf
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https://history.nih.gov/research/downloads/nuremberg.pdf
4. Gray Fred D (1998) The Tuskegee syphilis study. New South Books, Montgomery.
http://www.history.ucsb.edu/faculty/marcuse/classes/33d/projects/medicine/The%20Tuskegee%20Syphilis%20Study.htm
5. Centers for Disease Control and Prevention (2015) The Tuskegee timeline. In: U.S. public health service syphilis study at Tuskegee.
http://www.cdc.gov/tuskegee/timeline.htm