1. Key Laboratory for NeuroInformation of Ministry of Education, School of Life Science and Technology and Center for Information in BioMedicine; University of Electronic Science and Technology of China; Chengdu Sichuan 610054 People's Republic of China
2. Department of Radiology and Tianjin Key Laboratory of Functional Imaging; Tianjin Medical University General Hospital; Tianjin 300052 People's Republic of China
3. School of Sciences; Tianjin Polytechnic University; Tianjin 300130 People's Republic of China
4. Department of Medical Imaging; Jinling Hospital, Nanjing University School of Medicine; Nanjing 210002 People's Republic of China