1. Departments of Psychiatry and Neurology; Perelman School of Medicine at the University of Pennsylvania; Philadelphia Pennsylvania USA
2. Philadelphia Veterans Affairs Medical Center; Philadelphia Pennsylvania USA
3. Institute of Psychiatry; King's College London; London United Kingdom
4. Department of Neurology; the Royal Melbourne Hospital; Parkville Australia
5. Department of Psychiatry; University of Chicago School of Medicine; Chicago Illinois USA
6. Department of Neurology; Duke University School of Medicine; Durham North Carolina USA