1. Center for Medical Ethics and Health Policy, Baylor College of Medicine, Houston, TX 77030, USA.
2. Health Law and Policy Institute, University of Houston Law Center, Houston, TX 77204, USA.
3. Health Law Institute, University of Alberta, Edmonton, AL T6G 2H5, Canada.
4. Department of Bioethics and Humanities, University of Washington School of Medicine, Seattle, WA 98195, USA.