1. School of Statistics and Data Science, LPMC, KLMDASR and LEBPS, Nankai University, Tianjin, China;
2. Department of Statistics and Actuarial Science, University of Iowa, Iowa City, IA, USA;
3. Department of Statistics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China;
4. Division of Biostatistics, Washington University in Saint Louis, Saint Louis, MO, USA;
5. School of Mathematics and Statistics, Central China Normal University, Wuhan, Hubei, China;
6. Institute of Applied Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China;
7. School of Economics and Statistics, Guangzhou University, Guangdong, China