1. Beijing National Research Center for Information Science and Technology (BNRist), Beijing, P. R. China
2. Department of Electronic Engineering, Tsinghua University, Beijing, P. R. China
3. Vanke School of Public Health, Tsinghua University, Beijing, P. R. China
4. Institute for Healthy China, Tsinghua University, Beijing, P. R. China
5. Nuffield Department of Medicine, University of Oxford, UK