1. A. Bechara and D. Tranel, Department of Neurology, Division of Behavioral Neurology and Cognitive Neuroscience, University of Iowa College of Medicine, Iowa City, IA 52242, USA.
2. H. Damasio and A. R. Damasio, Department of Neurology, Division of Behavioral Neurology and Cognitive Neuroscience, University of Iowa College of Medicine, Iowa City, IA 52242, and The Salk Institute of Biological Studies, La Jolla, CA 92186, USA.