1. University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
2. Radiopharmaceuticals Production and Marketing Center, Institute of Nuclear Energy Research, Atomic Energy Council, Taoyuan 32546, Taiwan
3. Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
4. Small Animal MRI, Biomedical Research Imaging Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA