1. Department of MathematicsHong Kong Baptist University Hong Kong
2. Center for Evidence‐Based and Translational MedicineZhongnan Hospital of Wuhan University Wuhan China
3. School of StatisticsShandong Technology and Business University Yantai China
4. Zhongtai Securities Institute for Finance Studies, Shandong University Jinan China
5. Division of Biostatistics, School of Public HealthUniversity of Minnesota Minneapolis Minnesota USA