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2. Official Journal of the European Communities L,2001
3. Council for International Organizations of Medical Sciences (CIOMS) (2002) International ethical guidelines for biomedical research involving human subjects.
4. Council of Europe (2005) Additional protocol to the convention on human rights and biomedicine, concerning biomedical research. European Treaty Series No.195.
5. World Medical Association. Declaration of Helsinki: Ethical principles for medical research involving human subjects. Adopted June 1964, last amended October 2008. (After the submission of this manuscript, amended in October 2013.)