1. Health Law Institute, University of Alberta, Edmonton, Alberta T6G 2H5, Canada.
2. Riken Center for Developmental Biology, Kobe, Japan, 650-0047.
3. Keio University School of Medicine, Tokyo, Japan, 160-8582.
4. Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA.
5. Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
6. STREAM research group, Biomedical Ethics Unit, McGill University, Montreal, Quebec H3A 1X1, Canada.