1. Program on Regulation, Therapeutics, and Law, Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02120, USA.
2. Center for Bioethics, Harvard Medical School, Boston, MA 02115, USA.
3. Petrie-Flom Center, Harvard Law School, Cambridge, MA 02138, USA.
4. Warren Alpert Medical School, Brown University, Providence, RI 02903, USA.