1. Council for International Organizations of Medical Sciences (CIOMS) in collaboration with the World Health Organization (WHO). International Ethical Guidelines for Biomedical Research Involving Human Subjects. Geneva, Switzerland (2002). www.cioms.ch/publications/guidelines/guidelines_nov_2002_blurb.htm.
2. World Medical Association, (WMA). WMA Declaration of Helsinki – Ethical Principles for Medical Research Involving Human Subjects. Fortaleza, Brazil, October 2013. www.wma.net/en/30publications/10policies/b3/.
3. European Parliament, Council of the European Union. Directive 2001/20/EC of the European Parliament and of the Council of 4 April 2001 on the approximation of the laws, regulations and administrative provisions of the Member States relating to the implementation of good clinical practice in the conduct of clinical trials on medicinal products for human use. http://ec.europa.eu/health/files/eudralex/vol–1/dir_2001_20/dir_2001_20_en.pdf.
4. U.S. Department of Health and Human Services. U.S. Code of Federal Regulations, 45 CFR 46; revised 2009. www.hhs.gov/ohrp/humansubjects/guidance/45cfr46.html.
5. National Health Services. UK. Information sheets and consent forms. Guidance for researchers and reviewers. March 2011. www.hra.nhs.uk/documents/2013/09/information-sheet-and-consent-form-guidance.pdf.