Department of Applied Mathematics, School of Mathematics and Statistics, Xian Jiaotong University, Xian, China.|ShenZhen Research Institute of Big Data, ShenZhen, China.|School of Business Administration, Southwestern University of Finance and Economics, Chengdu, China.|Department of Applied Mathematics, School of Mathematics and Statistics, Xian Jiaotong University, Xian, China.|Xiyuan Hospital of China Academy of Chinese Medical Sciences, Beijing, China.|Centre for Quantitative Medicine, Program in Health Services and Systems Research, Duke-NUS Medical School, Singapore.|Department of Applied Mathematics, School of Mathematics and Statistics, Xian Jiaotong University, Xian, China.|Department of Mathematics, Hong Kong University of Science and Technology, Hong Kong, China.