1. School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China
2. Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing 100083 China
3. School of Biological Science and Medical Engineering Beihang University Beijing 100083 China
4. Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument Beijing Information Science and Technology University Beijing 100192 China
5. School of Computer and Information Technology City University of Hong Kong Hong Kong SAR China
6. Department of Thoracic Surgery Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Science Beijing 100730 China