1. School of Software Engineering, Beijing Jiaotong University, Beijing 100044, China
2. MOE Key Laboratory of Bioinformatics, Bioinformatics Division and Center for Synthetic & Systems Biology, BNRist, Tsinghua University, Beijing 100084, China
3. School of Medicine, Tsinghua University, Beijing 100084, China
4. School of Life Sciences, Peking University, Beijing 100871, China
5. Medical School of Chinese PLA, Beijing 100853, China
6. Department of Bioinformatics, School of Basic Medicine, Peking University Health Center, Beijing 100191, China
7. Department of Automation, Tsinghua University, Beijing 100084, China
8. Senior Department of Gastroenterology, First Medical Center of Chinese PLA General Hospital, Beijing 100036, China
9. Department of Biological Sciences, Center for Systems Biology, University of Texas at Dallas, Richardson, TX 75080, USA