Interesting and important ethical questions confront researchers, regulators, institutional review boards, support personnel, and research participants committed to the ethical conduct of human subjects research at all stages of research. Questions encompass - but are not limited to - study design, enrolling participants, balancing the clinical needs of participants against the research agenda, ending trials, discharging post-trial obligations, and resolving conflicts. Straightforward solutions to these types of questions are often not found in regulations, ethics codes, or the bioethics...