1. School of Biological Science and Medical Engineering, Southeast University, Nanjing, China
2. First Affiliated Hospital of Nanjing Medical University, Nanjing, China
3. Department of Computer Science and Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China
4. Jiangsu Provincial Joint International Research Laboratory of Medical Information Processing, the Laboratory of Image Science and Technology, the School of Computer Science and Engineering, Southeast University, Nanjing, China
5. Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA