Benedict M. Ashley, OP, a priest of the Dominican Order, Chicago Province, is Emeritus Professor of Moral Theology at Aquinas Institute of Theology in St. Louis. He is a senior fellow of the National Catholic Bioethics Center in Philadelphia. He has been honored with the medal Pro Ecclesia et Pontifice conferred by John Paul II and the Thomas Linacre Award from the National Federation of Catholic Physicians' Guilds. He is coautor of Ethics of Health Care: An Introductory Textbook, Third Edition (with Kevin O'Rourke, OP). Kevin O'Rourke, OP, is professor emeritus and founder of the Center for Health Care Ethics at the Saint Louis University Health Sciences Center. He is a professor of bioethics at the Neiswanger Institute of Bioethics and Public Policy, Stritch School of Medicine, Loyola University, Chicago. He is author of Medical Ethics: Sources of Catholic Teachings, Third Edition and coauthor of A Primer for Health Care Ethics: Essays for a Pluralistic Society, Second Edition.