1. Department of Nuclear Medicine, Chongqing Three Gorges Central Hospital, Wanzhou 404000, China
2. Clinical Test Center, Chongqing Three Gorges Central Hospital, Wanzhou 404000, China
3. Department of Radiology, Chongqing Three Gorges Central Hospital, Wanzhou 404000, China
4. Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
5. Medical School, China Three Gorges University, Yichang 443002, China