1. School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China
2. Zu Chongzhi Center for Mathematics and Computational Sciences (CMCS), Global Health Research Center (GHRC), Duke Kunshan University, 8 Duke Ave, Kunshan, Jiangsu, China
3. Department of Physiology and Biophysics, Rush University Medical Center, Chicago, Illinois, USA
4. School of Mathematics and Statistics, and Hubei Key Laboratory of Computational Science, Wuhan University, Wuhan 430072, China
5. School of Mathematical Sciences, Laboratory of Mathematics and Complex Systems, MOE, Beijing Normal University, 100875 Beijing, China