1. The Holy Bible. King James version, 2000. Daniel 1:12–15.
2. WMA Declaration of Helsinki—Ethical Principles for Medical Research Involving Human Subjects. Current (2008) version. http://www.wma.net/en/30publications/10policies/b3/index.html (accessed 19 May 2011).
3. Universal Declaration on Bioethics and Human Rights. http://www.unesco.org/new/en/social-and-human-sciences/themes/bioethics/bioethics-and-human-rights/ (accessed 14 Feb 2012).
4. International Ethical Guidelines for Biomedical Research Involving Human Subjects. http://www.cioms.ch/publications/layout_guide2002.pdf (accessed 14 Feb 2012).