Robert D Truog1, Robert C Tasker2. 1. Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston, MA; Center for Bioethics, Harvard Medical School, Boston, MA. Electronic address: robert.truog@childrens.harvard.edu. 2. Division of Critical Care Medicine, Department of Anesthesiology, Perioperative and Pain Medicine, Boston, MA; Department of Neurology, Boston Children's Hospital, Boston, MA.