1. Department of Nuclear Medicine, Inner Mongolia Medical University Affiliated Hospital, Hohhot, Inner Mongolia, China
2. Department of Nuclear Medicine, Inner Mongolia Medical University Affiliated People’s Hospital, Hohhot, Inner Mongolia, China
3. PET/CT/MRI Center, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
4. Department of Radiology, University of Louisville, Louisville KY, USA