1. PET
Center, Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, Connecticut 06510, United States
2. Barrow Neurological Institute, 350 West Thomas Rd, Phoenix, Arizona 85013, United States
3. Department
of Neurosurgery, Yale University School of Medicine, New Haven, Connecticut 06511, United States
4. Department
of Biomedical Engineering, Yale University, New Haven, Connecticut 06520, United States