1. National Center for HIV, STD and TB Prevention. The Tuskegee Syphilis Study: a hard lesson learned. Available at: http://www.cdc.gov/nchstp/od/tuskegee/time.htm.
2. The White House, Office of the Press Secretary. Remarks by the president in apology for study done in Tuskegee. Available at: http://clinton4.nara.gov/textonly/New/Remarks/Fri/19970516-898.html.
3. National Institutes of Health, Office of Human Subjects Research. The Belmont report: ethical principles and guidelines for the protection of human subjects of research. Available at: http://ohsr.od.nih.gov/guidelines/belmont.html.
4. National Institutes of Health, Office of Human Subjects Research. Directives for human experimentation: Nuremberg code. Available at: http://ohsr.od.nih.gov/guidelines/nuremberg.html.
5. National Institutes of Health, Office of Human Subjects Research. World Medical Association declaration of Helsinki: ethical principles for medical research involving human subjects. Available at: http://ohsr.od.nih.gov/guidelines/helsinki.html.