1. Complex Systems Research Center Shanxi University Taiyuan Shanxi China
2. China Animal Health and Epidemiology Center Qingdao China
3. Laboratory of Mathematical Parallel Systems (LAMPS) and Canadian Centre for Diseases Modeling (CCDM) Department of Mathematics and Statistics York University Toronto Canada
4. Shanxi Key Laboratory of Mathematical Techniques and Big Data Analysis on Disease Control and Prevention Shanxi University Taiyuan Shanxi China