1. Title 45 Code of Federal Regulations; Part 46. Available at: http://www.hhs.gov/ohrp/humansubjects/guidance/45cfr46.htm.
2. Variability among institutional review boards' decisions within the context of a multicenter trial;Silverman;Crit Care Med,2001
3. Office of the Inspector General. Institutional Review Boards. A time for reform. 1998. Available at http://www.oig.hhs.gov/oei/reports/oei-01-97-00193.pdf.
4. Oversight of human participants research: identifying problems to evaluate reform proposals;Emanuel;Ann Intern Med,2004
5. The difficulties and costs of ethical assessment of a national research project;Dockerty;N Z Med J,1992