1. Brain Injury Rehabilitation Unit, HealthONE Spalding Rehabilitation Hospital, Aurora, CO, USA
2. Neuropsychiatry Service, Department of Psychiatry, University of Colorado School of Medicine, Denver, CO, USA
3. Behavioral Neurology Section, Department of Neurology, University of Colorado School of Medicine, Denver, CO, USA
4. New York University School of Medicine, New York, NY, USA