1. University of California, Los Angeles, David Geffen School of Medicine, Department of Molecular and Medical Pharmacology, Los Angeles, CA, USA
2. Department of Nuclear Medicine, Hokkaido University, Sapporo, Japan
3. Department of Radiation Oncology, Stanford University, Stanford, CA, USA
4. University of Southern California, Department of Neurology, Los Angeles, CA, USA
5. Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA