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In this question-and-answer session, Mark Schreiner, MD, chair of the Committees for the Protection of Human Subjects (IRB) at the Children's Hospital of Philadelphia (CHOP) and an associate professor of anesthesia in pediatrics at the University of Pennsylvania in Philadelphia, PA, discusses the issue of informed consent in cluster-randomized clinical trials.

IRB Experts Q&A: Controversy: Informed consent and cluster-randomized trials