1. Laboratory of Molecular Imaging and Nanomedicine (LOMIN) National Institute of Biomedical Imaging and Bioengineering (NIBIB) National Institutes of Health (NIH); Bethesda MD 20892 USA
2. Center for Molecular Imaging and Translational Medicine School of Public Health; Xiamen University; Xiamen 361005 China
3. Department of Medical Imaging, Jinling Hospital Clinical School of Medical College; Nanjing University; Nanjing 210002 China