8The Nuremberg Code, 1949.Available at www.hhs.gov/phrp/ references/nurcode.htm.
9World Medical Assembly.Declarations of Helsinki 2000.Available at www.wma.net/e/ethicsunit/helsinki.htm.
10National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research.The Belmont Report: ethical Principles and Guidelines for the Protection of Human Subjects of Research.Washington,D C,U.S.Govemment Printing Office, 1979.