1. World Medical Association: Declaration of Helsinki. Ethical Principles for Medical Research Involving Human Subjects. [
http://www.wma.net/e/policy/pdf/17c.pdf
]
2. Council for International organizations of Medical Sciences (CIOMS): International guidelines for ethical review of epidemiological studies. Geneva. 2002
3. Nuffield council on Bioethics: The Ethics of Research Related to Healthcare in Developing Countries. London. 2002
4. World Health Organisation (WHO): Operational Guidelines for Ethics Committees that Review Biomedical Research. Geneva. 2000
5. Nuffield council on Bioethics: The Ethics of Research Related to Healthcare in Developing Countries, followup discussion paper. Lonodn. 2005