1. Emanuel EJ, Wendler D, Grady C. What makes clinical research ethical? JAMA 2000;283:2701–2711.
2. Emanuel EJ, Grady C, Crouch RA, et al. (eds.). The Oxford Textbook of Clinical Research Ethics. Oxford: Oxford University Press, 2008.
3. The Belmont Report: Ethical Principles and Guidelines for the Protection of Human Subjects of Research; The National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research, April 18, 1979. http://www.hhs.gov/ohrp/humansubjects/guidance/belmont.htm .
4. The Nuremberg Code. http://www.hhs.gov/ohrp/references/nurcode.htm .
5. World Medical Association Declaration of Helsinki. http://www.wma.net/e/policy/b3.htm .