1. Lab of Molecular Imaging and Translational Medicine (MITM) Engineering Research Center of Molecular & Neuroimaging Ministry of Education School of Life Science and Technology Xidian University & International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and Treatment Xi'an Shaanxi 710126 P. R. China
2. Guangzhou Institute of Technology Xidian University Guangzhou Guangdong 510555 P. R. China
3. Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures School of Life Sciences Tianjin University 92 Weijin Road, Nankai District Tianjin 300072 P. R. China
4. School of Biology and Engineering Guizhou Medical University Guizhou Guiyang 550025 P. R. China