1. Division of Biostatistics Washington University in St. Louis St. Louis USA
2. Research Center for Mathematics and Interdisciplinary Sciences Shandong University Qingdao China
3. Department of Biostatistics University of Michigan Ann Arbor USA
4. Department of Statistics University of California, Riverside California USA
5. Department of Statistics University of California, Irvine California USA
6. Zhongtai Securities Institute for Financial Studies Shandong University Jinan China