1. University of North Carolina – Chapel Hill, Center for Bioethics, 333 MacNider Hall, Chapel Hill, NC 27599–7240, USA.
2. Oregon State University, College of Public Health & Human Sciences, 2631 SW Campus Way (HFC), Corvallis, OR 97331–5102, USA
3. McGill University, Social Studies of Medicine Department, Biomedical Ethics Unit, 3647 Peel Street, 307, Montreal, QC H3A 1X1, Canada
4. Case Western Reserve University, School of Medicine, Department of Bioethics, 10900 Euclid Avenue, Cleveland, OH 44106–4976, USA