1. From the Neuroscience Division (B.P., J.C.M.), Center for Applied Medical Research, University of Navarra, Pamplona, Spain; CIBERNED (B.P., E.P., J.A., J.M.-C., J.C.M.), Pamplona, Spain; Department of Nuclear Medicine (E.P., J.A., J.O.), University of Navarra, Pamplona, Spain and Department of Radiology (J.O.), Hospital de Navarra, Pamplona, Spain.