Marvin S Swartz1, Jeffrey W Swanson2. 1. Box 3173, Department of Psychiatry & Behavioral Sciences, Duke University School of Medicine, Duke University Medical Center, Durham, NC 27710, USA. Electronic address: marvin.swartz@duke.edu. 2. Box 3173, Department of Psychiatry & Behavioral Sciences, Duke University School of Medicine, Duke University Medical Center, Durham, NC 27710, USA.