1. School of Statistics, Southwestern University of Finance and Economics, Chengdu 611130, China
2. Centre for Quantitative Medicine, Program in Health Services and Systems Research, Duke-NUS Medical School, 169857 Singapore
3. Biomedical Pioneering Innovation Center (BIOPIC), Peking University, Beijing 100871, China
4. Department of Statistics and Applied Probability, NUS, 117546 Singapore
5. Academy of Statistics and Interdisciplinary Sciences, Faculty of Economics and Management, East China Normal University, Shanghai 200062, China