From the Clinical Department (A.A.), National Institute for Infectious Diseases “Lazzaro Spallanzani,” Instituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Rome, Italy; Department of Neurology (G.A.), Heinrich Heine University, Dusseldorf, Germany; Departments of Neurology and Psychiatry (J.T.B.), University of Pittsburgh, PA; Department of Neurology and HIV Medicine (B.J.B.), St. Vincents Hospital, University of New South Wales, Sydney, Australia; Department of Psychiatry and Pathology (D... (At 2007-10-30)