Organ donors after circulatory determination of death: Not necessarily dead, and it does not necessarily matter*

Division of Pulmonary, Allergy, and Critical Care Medicine; Center for Bioethics, and Center for Clinical Epidemiology and Biostatistics; University of Pennsylvania School of Medicine; Philadelphia, PA (Halpern) Division of Critical Care Medicine; Department of Anesthesia; Children's Hospital Boston; Boston, MA; and Institute for Professionalism & Ethical Practice; Harvard Medical School; Boston, MA (Truog) This work was supported by a Greenwall Foundation Faculty Scholar Award in Bioethics to Dr. Halpern. The authors have not disclosed any potential conflicts of interest.