1. Research Department, Hong Kong Sanatorium & Hospital, Hong Kong
2. Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, China
3. Paul C. Lauterbur Research Centre for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, China
4. Paul C. Lauterbur Research Centre for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen, China
5. Department of Electrical Engineering and Department of Biomedical Engineering, The State University of New York at Buffalo, USA