1. Department of Psychology; University of California; Los Angeles Los Angeles CA
2. Coma Science Group, Cyclotron Research Center and Neurology Department; University and University Hospital of Liège; Liège Belgium
3. Division of Neurosurgery, University of Cambridge; Addenbrooke's Hospital; Cambridge United Kingdom
4. Department of Anesthesia and Intensive Care Medicine; Liège University Hospital; Liège Belgium
5. Brain and Mind Institute; University of Western Ontario; London Ontario Canada
6. Brain Injury Research Center, Department of Neurosurgery; Geffen School of Medicine at University of California; Los Angeles Los Angeles CA