1. Department of Social Medicine and Center for Bioethics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
2. Department of Philosophy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
3. Department of Sociology, Cuyahoga Community College, Cleveland, Ohio, USA.
4. Department of Public Policy and Center for Bioethics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
5. School of Law, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.