1. School of Management, Xi’an Jiaotong University, Xi’an, People’s Republic of China
2. Division of Biostatistics, Jockey Club School of Public Health and Primary Care, Chinese University of Hong Kong, Shatin, Hong Kong
3. School of Mathematics and VC & VR Province Key Laboratory, Sichuan Normal University, Chengdu, People’s Republic of China
4. School of Mathematical Sciences, University of Electronic Science and Technology, Chengdu, People’s Republic of China