1. 4. Id. § 46.111(b) (2003). Some commentators have criticized the categorization of persons into different vulnerable groups, and have instead urged that in place of such categorization, investigators and institutional review boards take steps to recognize—as well as to avoid — situations in which a person's vulnerability to harm or coercion is created. See National Bioethics Advisory Commission, Report and Recommendations of the National Bioethics Advisory Commission, vol. 1 of Ethical and Policy Issues in Research Involving Human Participants (2001), available at .
2. No free lunch for estrogen
3. No free lunch for estrogen
4. 12. National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research, supra note 8; 45 C.F.R. § 46.402(a) (2003).
5. 14. OPRR 1993, supra note 11; National Institutes of Health, U.S. Department of Justice, NIH Policy and Guidelines on the Inclusion of Children as Participants in Research Involving Human Subjects, NIH Notice 98–024 (March 6, 1998), available at .