1. Department of Medical Ethics and Health PolicyUniversity of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
2. Center for BioethicsHarvard Medical School Boston Massachusetts USA
3. Department of MedicineUniversity of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
4. University of Pennsylvania Carey Law School Philadelphia Pennsylvania USA
5. Department of Health Services, Policy & Practice Brown University School of Public Health Providence Rhode Island USA
6. Center for Gerontology and Health Care ResearchBrown University School of Public Health Providence Rhode Island USA
7. Center for Ethics and PolicyCarnegie Mellon University Pittsburgh Pennsylvania USA
8. Department of NeurologyUniversity of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA