Protection of health research participants in the United States: a review of two cases.

: Two research-related deaths and controversies in the United States during recent years have raised public concern over the safety of research participants. This paper explores the reasons why, in two studies, there was a failure of ethical oversight. The issues exposed by these failures have international relevance as they could possibly occur anywhere where human health research is carried out. Five factors that contributed to these failures are highlighted: 1. failure to support and resource research ethics committees; 2. failure of the research oversight process to adequately assess the risks and benefits of research, while giving undue emphasis to informed consent; 3. conflicts of interest arising from financial relationships and research ethics committee membership; 4. lack of consistent oversight of privately funded research; and 5. incompetent or intentional failure to adhere by ethical guidelines. There is considerable headway to be made in the United States, as in other countries, in the fostering and maintenance of robust systems of human research oversight.