Farr Curlin is Josiah C. Trent Professor of Medical Humanities at Duke University. He holds appointments in the School of Medicine; the Trent Center for Bioethics, Humanities and History of Medicine; the Divinity School; and the Kenan Institute for Ethics. Curlin has authored more than one hundred and thirty articles and book chapters on medicine and bioethics.

Christopher Tollefsen is the College of Arts and Sciences Distinguished Professor of Philosophy at the University of South Carolina. He is the author and editor of numerous books, including Embryo: A Defense of Human Life and Lying and Christian Ethics.